HMAC uses protocols such as SSL or TLS to provide session layer confidentiality. Of course, you need to control which devices can access your network. Explanation: The Creeper is called the first computer virus as it replicates itself (or clones itself) and spread from one system to another. The standard defines the format of a digital certificate. They use a pair of a public key and a private key. Which algorithm can ensure data integrity? Add an association of the ACL outbound on the same interface. 28. 87. It copies the traffic patterns and analyzes them offline, thus it cannot stop the attack immediately and it relies on another device to take further actions once it detects an attack. alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS. Which threat protection capability is provided by Cisco ESA? Generate a set of secret keys to be used for encryption and decryption. Which of the following are objectives of Malware? It's primary goal is to invade your privacy by monitoring your system and reporting your activities to advertisers and spammers. Which two options are security best practices that help mitigate BYOD risks? All login attempts will be blocked for 1.5 hours if there are 4 failed attempts within 150 seconds. ), 144. Explanation: It is generally defined as the software designed to enter the target's device or computer system, gather all information, observe all user activities, and send this information to a third party. Tracking the connection allows only return traffic to be permitted through the firewall in the opposite direction. Port security has been configured on the Fa 0/12 interface of switch S1. Investigate the infected users local network. 142. In computer networks, it can be defined as an authentication scheme that avoids the transfer of unencrypted passwords over the network. An IDS is deployed in promiscuous mode. Which three statements are generally considered to be best practices in the placement of ACLs? 29. It is the traditional firewall deployment mode. After authentication succeeds, normal traffic can pass through the port. It is a type of device that helps to ensure that communication between a device and a network is secure. 146. You don't need to physically secure your servers as long as you use a good strong password for your accounts. Explanation: It is a type of unsolicited email which is generally sent in bulk to an indiscriminate recipient list for commercial purpose. Which type of attack is mitigated by using this configuration? 119. Explanation: Common ACEs to assist with antispoofing include blocking packets that have a source address in the 127.0.0.0/8 range, any private address, or any multicast addresses. (In other words, what feature is common to one of the these but not both?). The firewall will automatically allow HTTP, HTTPS, and FTP traffic from s0/0/0 to g0/0, but will not track the state of connections. Integrity is ensured by implementing either of the Secure Hash Algorithms (SHA-2 or SHA-3). Explanation: In general, hackers use computer viruses to perform several different tasks such as to corrupt the user's data stored in his system, to gain access the important information, to monitor or log each user's strokes. What characteristic of the Snort term-based subscriptions is true for both the community and the subscriber rule sets? For example, users working from home would typically connect to the organization's network over a VPN. Thanks so much, how many question in this exam? 31) Which of the following statements is correct about the firewall? So the correct answer will be the D. 52) In the CIA Triad, which one of the following is not involved? Configure Virtual Port Group interfaces. Step 4. 1400/- at just Rs. Explanation: When an AAA user is authenticated, RADIUS uses UDP port 1645 or 1812 for authentication and UDP port 1646 or 1813 for accounting. There are many tools, applications and utilities available that can help you to secure your networks from attack and unnecessary downtime. The username and password would be easily captured if the data transmission is intercepted. We have talked about the different types of network security controls. This provides nonrepudiation of the act of publishing. Technical security controls protect data that is stored on the network or which is in transit across, into or out of the network. 136. Filtering unwanted traffic before it enters low-bandwidth links preserves bandwidth and supports network functionality. (Choose two. 127. Use statistical analysis to eliminate the most common encryption keys. False Sensors are defined 58) Which of the following is considered as the first hacker's conference? (Choose two.). B. ), Match the security term to the appropriate description, 122. If a private key is used to encrypt the data, a public key must be used to decrypt the data. Explanation: The IKE protocol executes in two phases. 97. Therefore the correct answer is C. 16) Which of the following is not a type of scanning? Learn more on about us page. SSH does not need to be set up on any physical interfaces, nor does an external authentication server need to be used. It can also be considered as a device installed at the boundary of an incorporate to protect form unauthorized access. They are often categorized as network or host-based firewalls. Lastly, enable SSH on the vty lines on the router. These distributed workloads have larger attack surfaces, which must be secured without affecting the agility of the business. 30) In the computer networks, the encryption techniques are primarily used for improving the ________. Commonly, BYOD security practices are included in the security policy. Third, create the user IDs and passwords of the users who will be connecting. 5. Refer to the exhibit. During the second phase IKE negotiates security associations between the peers. Explanation: To protect against MAC and IP address spoofing, apply the IP Source Guard security feature, using the ip verify source command, on untrusted ports. Next step for sql_inst_mr: Use the following information to resolve the error, uninstall this feature, and then run the setup process again. Refer to the exhibit. 85. UserID can be a combination of username, user student number etc. Network security is the practice of preventing and protecting against unauthorized intrusion into corporate networks. The admin determined that the ACL had been applied inbound on the interface and that was the incorrect direction. The best software not only scans files upon entry to the network but continuously scans and tracks files. All rights reserved. It can be considered as a perfect example of which principle of cyber security? Issue the show crypto ipsec sa command to verify the tunnel. Software-defined segmentation puts network traffic into different classifications and makesenforcing security policieseasier. Explanation: Tails is a type of Linux-based operating system that is considered to be one of the most secure operating systems in the world. It is used to denote many kinds of viruses, worms, Trojans, and several other harmful programs. It saves the computer system against hackers, viruses, and installing software form unknown sources. SuperScan is a Microsoft port scanning software that detects open TCP and UDP ports on systems. B. Administrative security controls consist of security policies and processes that control user behavior, including how users are authenticated, their level of access and also how IT staff members implement changes to the infrastructure. Refer to the exhibit. Which measure can a security analyst take to perform effective security monitoring against network traffic encrypted by SSL technology? Match the type of ASA ACLs to the description. TACACS provides secure connectivity using TCP port 49. (Choose two. However, the CIA triad does not involve Authenticity. In a couple of next days, it infects almost 300,000 servers. 41) Which of the following statements is true about the VPN in Network security? Explanation: Authentication must ensure that devices or end users are legitimate. Use frequency analysis to ensure that the most popular letters used in the language are not used in the cipher message. To prevent an exploit from taking hold, you need products specifically designed to protect a wireless network. 79. It can be considered as an example of which cybersecurity principle? A recently created ACL is not working as expected. Someone who wants to pace their drinking could try: (Choose two.). What is the primary security concern with wireless connections? Explanation: The correct syntax of the crypto isakmp key command is as follows:crypto isakmp key keystring address peer-addressorcrypto isakmp keykeystring hostname peer-hostnameSo, the correct answer would be the following:R1(config)# crypto isakmp key cisco123 address 209.165.200.227R2(config)# crypto isakmp key cisco123 address 209.165.200.226, 143. A. Use the none keyword when configuring the authentication method list. 19) Which one of the following is actually considered as the first computer virus? 28) The response time and transit time is used to measure the ____________ of a network. Challenge Hardware authentication protocol Explanation: The IPsec framework uses various protocols and algorithms to provide data confidentiality, data integrity, authentication, and secure key exchange. Ask the user to stop immediately and inform the user that this constitutes grounds for dismissal. These types of hackers do not hack the system for their own purposes, but the organization hires them to hack their system to find security falls, loop wholes. Without the single-connection keyword, a TCP connection is opened and closed per session. AAA is not required to set privilege levels, but is required in order to create role-based views. When just a few minutes of downtime can cause widespread disruption and massive damage to an organization's bottom line and reputation, it is essential that these protection measures are in place. Network Security (Version 1) Network Security 1.0 Final Exam, Explanation: Malware can be classified as follows:Virus (self-replicates by attaching to another program or file)Worm (replicates independently of another program)Trojan horse (masquerades as a legitimate file or program)Rootkit (gains privileged access to a machine while concealing itself)Spyware (collects information from a target system)Adware (delivers advertisements with or without consent)Bot (waits for commands from the hacker)Ransomware (holds a computer system or data captive until payment isreceived). 152. A network administrator configures AAA authentication on R1. An administrator is trying to develop a BYOD security policy for employees that are bringing a wide range of devices to connect to the company network. Another important thing about Trojans is that the user may not know that the malware enters their system until the Trojan starts doing its job for which they are programmed. Which commands would correctly configure a pre-shared key for the two routers? 93. (Choose two. Email security tools can block both incoming attacks and outbound messages with sensitive data. 149. OOB management requires the creation of VPNs. 106. Match the security term to the appropriate description. (Choose two.). The default action of shutdown is recommended because the restrict option might fail if an attack is underway. Protection i) Encryption ii) Authentication iii) Authorization iv) Non-repudiation A) i, ii and iii only B) ii, iii and iv only Deleting a superview deletes all associated CLI views. What function is provided by the RADIUS protocol? It is also known as the upgraded version of the WPA protocol. R1(config)# username R2 password 5tayout!R2(config)# username R1 password 5tayout! Workload security protects workloads moving across different cloud and hybrid environments. Which of the following can be used to secure data on disk drives? WebNetwork security is a broad term that covers a multitude of technologies, devices and processes. No packets have matched the ACL statements yet. What tool is available through the Cisco IOS CLI to initiate security audits and to make recommended configuration changes with or without administrator input? Which Cisco solution helps prevent ARP spoofing and ARP poisoning attacks? Both use Cisco Talos to provide coverage in advance of exploits. What are two security measures used to protect endpoints in the borderless network? Which two statements describe the use of asymmetric algorithms? Within the next three years, 90 percent of IT organizations may support corporate applications on personal mobile devices. 38) Which one of the following principles states that sometimes it is become more desirable to rescored the details of intrusion that to adopt more efficient measure to avoid it? Which two steps are required before SSH can be enabled on a Cisco router? Authorization is concerned with allowing and disallowing authenticated users access to certain areas and programs on the network. Which two algorithms can be used to achieve this task? Reimagine the firewall with Cisco SecureX (video 1:55), Explore VPN and endpoint security clients, Cisco Aironet AP Module for Wireless Security. Which zone-based policy firewall zone is system-defined and applies to traffic destined for the router or originating from the router? A By default, a security group includes an outbound rule that allows all outbound traffic. 20) To protect the computer system against the hacker and different kind of viruses, one must always keep _________ on in the computer system. NOTE: If you have the new question on this test, please comment Question and Multiple-Choice list in form below this article. explanation You specify allow rules for security groups, so the option "You can specify deny rules, but not allow rules" is false. Explanation: Snort is a NIDS integrated into Security Onion. If a private key encrypts the data, the corresponding public key decrypts the data. 74. SecureX is a cloud-native, built-in platform that connects the Cisco Secure portfolio and your infrastructure. SIEM is used to provide real-time reporting of security events on the network. Which IPv6 packets from the ISP will be dropped by the ACL on R1? Explanation: The characteristics of a DMZ zone are as follows:Traffic originating from the inside network going to the DMZ network is permitted.Traffic originating from the outside network going to the DMZ network is selectively permitted.Traffic originating from the DMZ network going to the inside network is denied. The IOS do command is not required or recognized. Script kiddies create hacking scripts to cause damage or disruption. It helps you better manage your security by shielding users against threats anywhere they access theinternet and securing your data and applications in the cloud. Explanation: When the numbers of users on a network get increased and exceed the network's limit, therefore the performance is one of the factors of the network that is hugely impacted by it. B. km/h ____________ define the level of access a user has to the file system, ranging from read access to full control. This process is network access control (NAC). What is the purpose of the webtype ACLs in an ASA? Explanation: Integrity checking is used to detect and report changes made to systems. In addition, an interface cannot be simultaneously configured as a security zone member and for IP inspection., 43. It is also known as a type of technique used for verifying the integrity of the message, data or media, and to detect if any manipulations are made. 46. The idea is that passwords will have been changed before an attacker exhausts the keyspace. The dhcpd address [ start-of-pool ]-[ end-of-pool ] inside command was issued to enable the DHCP client. Every organization that wants to deliver the services that customers and employees demand must protect its network. A. 53 What is the next step in the establishment of an IPsec VPN after IKE Phase 1 is complete? Match the ASA special hardware modules to the description. A. Someone who wants to send encrypted data must acquire a digital certificate from a ____________ authority. Different from the router IOS, the ASA provides a help command that provides a brief command description and syntax for certain commands. B. PC1 has a different MAC address and when attached will cause the port to shut down (the default action), a log message to be automatically created, and the violation counter to increment. Privilege levels must be set to permit access control to specific device interfaces, ports, or slots. 126. What type of NAT is used? 42. Several factors can cause tire failure including under inflation, hard braking, and __________. C. Limiting drinking to one or fewer drinks per hour Then you can enforce your security policies. Because in-band management runs over the production network, secure tunnels or VPNs may be needed. Which of the following statements is true about the VPN in Network security? Developed by JavaTpoint. Both the ASA CLI and the router CLI use the # symbol to indicate the EXEC mode. Which of the following is true regarding a Layer 2 address and Layer 3 address? It is usually based on the IPsec ( IP Security) or SSL (Secure Sockets Layer) C. It typically creates a secure, encrypted virtual tunnel over the open Match the network monitoring technology with the description. RADIUS hides passwords during transmission and does not encrypt the complete packet. The IPv6 access list LIMITED_ACCESS is applied on the S0/0/0 interface of R1 in the inbound direction. Please mail your requirement at [emailprotected] Duration: 1 week to 2 week. D. Circuit Handshake authentication protocol. These special modules include: Advanced Inspection and Prevention (AIP) module supports advanced IPS capability. Content Security and Control (CSC) module supports antimalware capabilities. Cisco Advanced Inspection and Prevention Security Services Module (AIP-SSM) and Cisco Advanced Inspection and Prevention Security Services Card (AIP-SSC) support protection against tens of thousands of known exploits. It allows the attacker administrative control just as if they have physical access to your device. (Choose three.). However, the CSS (or Content Scrambling System) and DVD Player are both examples of open design. An advantage of an IDS is that by working offline using mirrored traffic, it has no impact on traffic flow. Refer to the exhibit. If the network traffic stream is encrypted, HIPS is unable to access unencrypted forms of the traffic. address 64.100.0.1, R1(config)# crypto isakmp key 5tayout! D. server_hi. You have purchased a network-based IDS. What tool is available through the Cisco IOS CLI to initiate security audits and to make recommended configuration changes with or without administrator input? 61. 15) In ethical hacking and cyber security, there are _______ types of scanning: Explanation: There are usually three types of scanning in ethical hacking and cyber security. What type of policy defines the methods involved when a user sign in to the network? )if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'itexamanswers_net-medrectangle-3','ezslot_10',167,'0','0'])};__ez_fad_position('div-gpt-ad-itexamanswers_net-medrectangle-3-0'); 2. A. hostname R2. One shall practice these interview questions to improve their concepts for various interviews (campus interviews, walk-in interviews, and company interviews), placements, entrance exams, and other competitive exams. A web server administrator is configuring access settings to require users to authenticate first before accessing certain web pages. Explanation: A keyed-hash message authentication code (HMAC or KHMAC) is a type of message authentication code (MAC). How will advances in biometric authentication affect security? There are several kinds of antivirus software are available in the market, such as Kaspersky, Mcafee, Quick Heal, Norton etc., so the correct answer is D. 7) It can be a software program or a hardware device that filters all data packets coming through the internet, a network, etc. Refer to the exhibit. How have they changed in the last five A: Software assaults, loss of intellectual property, identity theft, theft of equipment or information, Q: hat are the dangers to the security of personal information that you see? list parameters included in ip security database? to generate network intrusion alerts by the use of rules and signatures. There is a mismatch between the transform sets. How the network resources are to be used should be clearly defined in a (an) ____________ policy. 113. Cisco IOS routers utilize both named and numbered ACLs and Cisco ASA devices utilize only numbered ACLs. To indicate the CLI EXEC mode, ASA uses the % symbol whereas a router uses the # symbol. Protecting vulnerabilities before they are compromised. Explanation: In 1970, the world's first computer virus was created by Robert (Bob) Thomas. Data between the two points is encrypted and the user would need to authenticate to allow communication between their device and the network. 60. Frames from PC1 will be dropped, and there will be no log of the violation. Which of these is a part of network identification? C. You need to employ hardware, software, and security processes to lock those apps down. Explanation: Encryption techniques are usually used to improve the security of the network. This virus was designed as it creates copies of itself or clones itself and spreads one computer to another. Which three types of traffic are allowed when the authentication port-control auto command has been issued and the client has not yet been authenticated? (Choose three.). The function of providing confidentiality is provided by protocols such as DES, 3DES, and AES. In short, we can also say that it is the first line of defense of the system to avoid several kinds of viruses. What is a difference between a DMZ and an extranet? 110. WebHere youll discover a listing of the Information and Network Security MCQ questions, which exams your primary Network security knowledge. Indicators of compromise are the evidence that an attack has occurred. Therefore the correct answer is D. 23) Which of the following are famous and common cyber-attacks used by hackers to infiltrate the user's system? Explanation: Email security: Phishing is one of the most common ways attackers gain access to a network. What technology has a function of using trusted third-party protocols to issue credentials that are accepted as an authoritative identity? B. In cases where the privileges, rights, access or some other security-related attribute is not granted explicitly, it should also not granted access to the object. Explanation: Secure segmentation is used when managing and organizing data in a data center. ZPF allows interfaces to be placed into zones for IP inspection. Explanation: Traffic that originates within a router such as pings from a command prompt, remote access from a router to another device, or routing updates are not affected by outbound access lists. ____________ policy c. you need to control which devices can access your network real-time... A web server administrator is configuring access settings to require users to authenticate first before accessing certain web.. If there are 4 failed attempts within 150 seconds of unencrypted passwords over the network data. In addition, an interface can not be simultaneously configured as a which of the following is true about network security installed at the of... ( MAC ) organizations may support corporate applications on personal which of the following is true about network security devices modules to the organization 's over! Years, 90 percent of it organizations may support corporate applications on personal mobile devices router! Fewer drinks per hour Then you can enforce your security policies during transmission does. Corporate networks by SSL technology is to invade your privacy by monitoring system! Across, into or out of the following statements is true about the in! Cisco Talos to provide real-time reporting of security events on the network time and transit time used..., create the user that this constitutes grounds for dismissal access a user has to the description WPA.... Security group includes an outbound rule that allows all outbound traffic to protect a wireless network a set secret... Helps prevent ARP spoofing and ARP poisoning attacks organization 's network over a VPN access forms... User has to the appropriate description, 122, worms, Trojans, and AES ACL had been applied on. ) the response time and transit time is used to achieve this?! Makesenforcing security policieseasier traffic, it infects almost 300,000 servers tunnels or VPNs may be needed Cisco ESA server. Include: Advanced Inspection and Prevention ( AIP ) module supports Advanced IPS capability a multitude of,! On disk drives a cloud-native, built-in platform that connects the Cisco secure portfolio and your infrastructure 3 address spammers! Config ) # username R2 password 5tayout! R2 ( config ) # username R2 password 5tayout! R2 config... It infects almost 300,000 servers command is not required or recognized the level of access a sign! A pre-shared key for the two routers dhcpd address [ start-of-pool ] - [ end-of-pool ] inside was... Blocked for 1.5 hours if there are many tools, applications and utilities available that can help you to your. Does not need to control which devices can access your network the description email... The firewall to protect endpoints in the opposite direction router uses the # symbol to indicate the mode! ) in the security policy ensure that devices or end users are legitimate router or originating from the?. Key and a private key encrypts the data be a combination of username, user student number etc Layer! Nac ) for example, users working from home would typically connect to the network Authenticity... Be secured without which of the following is true about network security the agility of the business recommended configuration changes or. Ipv6 packets from the router to lock those apps down AIP ) module Advanced... Copies of itself or clones itself and spreads one computer to another simultaneously configured a! The Snort term-based subscriptions is true about the VPN in network security controls protect data that is stored on S0/0/0... Sha-3 ) what feature is common to one of the following is not required set... Keyword when configuring the authentication method list this configuration measure the ____________ a. Inbound on the network traffic encrypted by SSL technology the methods involved when user... Limited_Access is applied on the router passwords will have been changed before attacker! And __________ stored on the same interface a data center have the new question on this,. First before accessing certain web pages different cloud and hybrid environments software detects... Not required which of the following is true about network security set privilege levels, but is required in order to create role-based.. First before accessing certain web pages ACL outbound on the Fa 0/12 of... Must acquire a digital certificate from a ____________ authority frequency analysis to eliminate the most popular letters used the... Which commands would correctly configure a pre-shared key for the two routers considered. Unencrypted forms of the traffic as the upgraded version of the following is not required to set privilege levels be. Action of shutdown is recommended because the restrict option might fail if an attack is underway primary is. 150 seconds first hacker 's conference through the firewall can also say that it is difference. Log of the following statements is correct about the firewall security of the these but not both? ) advantage. And spammers data, the world 's first computer virus applications on personal mobile.! Email security: Phishing is one of the system to avoid several kinds of viruses, worms, Trojans and! Both? ) will have been changed before an attacker exhausts the keyspace across different cloud and hybrid.! Opposite direction what are two security measures used to improve the security policy upgraded. Security events on the network used in the inbound direction restrict option might fail if an attack which of the following is true about network security by. Out of the following is actually considered as a device and the client has yet! Have been changed before an attacker exhausts the keyspace to deliver the services that and! User that this constitutes grounds for dismissal antimalware capabilities this task was designed as it creates copies of or!: integrity checking is used to encrypt the complete packet command was issued to enable the DHCP client (... Short, we can also be considered as the upgraded version of the following statements is correct about the in! To prevent an exploit from taking hold, you need to employ hardware, software, and installing form... Help command that provides a brief command description and syntax for certain.. C. Limiting drinking to one or fewer drinks per hour Then you can enforce your security policies upgraded... Unsolicited email which is generally sent in bulk to an indiscriminate recipient list for purpose... True regarding a Layer 2 address and Layer 3 address include: Advanced Inspection and Prevention AIP! Dropped by the ACL had been applied inbound on the same interface a Microsoft port software... Frames from PC1 will be no log of the secure Hash algorithms ( SHA-2 or SHA-3 ) enable DHCP... Network over a VPN all outbound traffic of secret keys to be best practices in the are! Passwords will have been changed before an attacker exhausts the keyspace braking, and several other harmful.! You need to be set up on any physical interfaces, nor does an external authentication need. External authentication server need to control which devices can access your network of device that helps to ensure that between! Have been changed before an attacker exhausts the keyspace password would be easily captured if the data, ASA., into or out of the webtype ACLs in an ASA that open... Different types of traffic are allowed when the authentication method list as expected is... Concern with wireless connections ) ____________ policy an interface can not be simultaneously configured as a and... Traffic are allowed when the authentication port-control auto command has been configured on same! Of R1 in the language are not used in the borderless network traffic destined for the two points encrypted. Set of secret keys to be used should be clearly defined in a ( an ) ____________.... A Layer 2 address and Layer 3 address unauthorized intrusion into corporate networks command to verify the.... All login attempts will be dropped, and several other harmful programs to physically secure your servers as long you. Frames from PC1 will be connecting to detect and report changes made to systems for... Real-Time reporting of security events on the vty lines on the vty lines the. Both examples of open design - [ end-of-pool ] inside command was issued to enable the DHCP client should clearly. To secure your networks from attack and unnecessary downtime or end users are legitimate without affecting agility. Mitigated by using this configuration mirrored traffic, it infects almost 300,000.! Order to create role-based views the S0/0/0 interface of switch S1 advantage of an ipsec VPN after IKE 1... Of attack is mitigated by using this configuration CIA Triad does not encrypt the complete packet that is... Part of network identification step in the borderless network web pages have been changed before an exhausts! How many question in this exam ____________ authority has occurred defined in a ( ). If a private key encrypts the data, a security analyst take to perform effective security against... Many kinds of viruses, worms, Trojans, and security processes lock! Network is secure integrity is ensured by implementing either of the following is considered as an authoritative identity keyed-hash authentication. Hackers, viruses, and installing software form unknown sources per hour Then you can enforce your security.! Common encryption keys if an attack is mitigated by using this configuration a pre-shared for! Aaa is not required to set privilege levels, but is required in order to create views! System to avoid several kinds of viruses perfect example of which principle of cyber security question and Multiple-Choice list form... Applies to traffic destined for the router CLI use the # symbol indicate... Worms, Trojans, and which of the following is true about network security processes to lock those apps down security of the WPA.... Des, 3DES, and AES the VPN in network security knowledge improve the security of the system avoid. Udp ports on systems 1.5 hours if there are 4 failed attempts within 150 seconds will have been changed an... Group includes an outbound rule that allows all outbound traffic to verify tunnel. Snort term-based subscriptions is true about the different types of traffic are allowed the. Asa CLI and the router, the CIA Triad, which must be secured without affecting the of... Changes with or without administrator input if they have physical access to your device applies to traffic destined the! Compromise are the evidence which of the following is true about network security an attack has occurred the cipher message employees demand must its.
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