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CCNA Cybersecurity Operations (Vesion 1.1) – CyberOps Chapter 4 Exam Answers

CCNA CyberOps Associate
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  1. If the default gateway is configured incorrectly on the host, what is the impact on communications?
    • The host is unable to communicate on the local network.
    • There is no impact on communications.
    • The host can communicate with other hosts on remote networks, but is unable to communicate with hosts on the local network.
    • The host can communicate with other hosts on the local network, but isunable to communicate with hosts on remote networks. *

  2. Which message delivery option is used when all devices need to receive the same message simultaneously?
    • Duplex
    • Unicast
    • Multicast
    • Broadcast *

  3. How is a DHCPDISCOVER transmitted on a network to reach a DHCP server?
    • A DHCPDISCOVER message is sent with a multicast IP address that all DHCP servers listen to as the destination address.
    • A DHCPDISCOVER message is sent with the broadcast IP address as the destination address.
    • A DHCPDISCOVER message is sent with the IP address of the default gateway as the destination address.
    • A DHCPDISCOVER message is sent with the IP address of the DHCP server as the destination address.

  4. What part of the URL, http://www.cisco.com/index.html, represents the top-level DNS domain?
    • www
    • http
    • index
    • com

  5. The graphic shows a network diagram as follows:
    PC A connects to switch S1, which connects to the G0/0 interface of router R1. PC B connects to switch S2, which connects to the G0/1 interface of router R1. A network analyst is connected to switch S2. The address of each device is as follows:
    PC A: 192.168.1.212 and FE80::1243:FEFE:8A43:2122 and 01-90-C0-E4-55-BB
    PC B: 192.168.2.101 and FE80::FBB2:E77A:D143 and 08-CB-8A-5C-D5-8A
    R1 G0/0:192.168.1.1 and FE80::1 and 00-D0-D3-BE-79-26
    R1 G0/1: 192.168.2.1 and FE80::1 and 00-60-0F-B1-D1-11

    Refer to the exhibit. A cybersecurity analyst is viewing captured ICMP echo request packets sent from host A to host B on switch S2. What is the source MAC address of Ethernet frames carrying the ICMP echo request packets?

    • 08-CB-8A-5C-D5-BA
    • 00-D0-D3-BE-79-26
    • 00-60-0F-B1-D1-11
    • 01-90-C0-E4-55-BB

  6. Refer to the exhibit. A cybersecurity analyst is viewing captured packets forwarded on switch S1. Which device has the MAC address 50:6a:03:96:71:22?
    • PC-A
    • router DG
    • DSN server
    • router ISP
    • web server
    Explanation: The Wireshark capture is of a DNS query from PC-A to the DNS server. Because the DNS server is on a remote network, the PC will send the query to the default gateway router, router DG, using the MAC address of the router G0/0 interface on the router.

  7. Which term is used to describe the process of placing one message format inside another message format?
    • encoding
    • multiplexing
    • encapsulation
    • segmentation

  8. Which PDU format is used when bits are received from the network medium by the NIC of a host?
    • frame
    • file
    • packet
    • segment

  9. What addresses are mapped by ARP?
    • Destination IPv4 address to the source MAC address
    • Destination IPv4 address to the destination hostname
    • Destination MAC address to the source IPv4 address
    • Destination MAC address to a destination IPv4 address *

  10. Which statement is true about FTP?
    • The client can download data from or upload data to the server. *
    • The client can choose if FTP is going to establish one or two connections with the server.
    • FTP is a peer-to-peer application.
    • FTP does not provide reliability during data transmission.

  11. Which two OSI model layers have the same functionality as two layers of the TCP/IP model? (Choose two.)
    • Session
    • Transport *
    • Network *
    • Data link
    • Physical

  12. Which statement is true about the TCP/IP and OSI models?
    • The TCP/IP transport layer and OSI Layer 4 provide similar services and functions. *
    • The TCP/IP network access layer has similar functions to the OSI network layer.
    • The OSI Layer 7 and the TCP/IP application layer provide identical functions.
    • The first three OSI layers describe general services that are also provided by the TCP/IP Internet layer.

  13. Which application layer protocol uses message types such as GET, PUT, and POST?
    • SMTP
    • POP3
    • DHCP
    • HTTP
    • DNS

  14. Which transport layer feature is used to guarantee session establishment?
    • UDP sequence number
    • TCP 3-way handshake
    • TCP port number
    • UDP ACK flag

  15. What is the prefix length notation for the subnet mask 255.255.255.224?
    • /26
    • /27
    • /28
    • /25

  16. What are two potential network problems that can result from ARP operation? (Choose two.)
    • Multiple ARP replies result in the switch MAC address table containing entries that match the MAC addresses of hosts that are connected to the relevant switch port.
    • Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent of intercepting network traffic.
    • On large networks with low bandwidth, multiple ARP broadcasts could cause data communication delays.
    • Manually configuring static ARP associations could facilitate ARP poisoning or MAC address spoofing.
    • Large numbers of ARP request broadcasts could cause the host MAC address table to overflow and prevent the host from communicating on the network.

  17. Which TCP mechanism is used to identify missing segments?
    • sequence numbers
    • FCS
    • acknowledgments
    • window size

  18. What is the most compressed representation of the IPv6 address 2001:0000:0000:abcd:0000:0000:0000:0001?
    • 2001::abcd::1
    • 2001:0:abcd::1
    • 2001::abcd:0:1
    • 2001:0:0:abcd::1 *
    • 2001:0000:abcd::1

  19. What three application layer protocols are part of the TCP/IP protocol suite? (Choose three.)
    • ARP
    • DHCP *
    • DNS *
    • FTP *
    • NAT
    • PPP

  20. What are two features of ARP? (Choose two.)
    • An ARP request is sent to all devices on the Ethernet LAN and contains the IP address of the destination host and its multicast MAC address.
    • If no device responds to the ARP request, then the originating node will broadcast the data packet to all devices on the network segment.
    • When a host is encapsulating a packet into a frame, it refers to the MAC address table to determine the mapping of IP addresses to MAC addresses.
    • If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast.
    • If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.

  21. In NAT translation for internal hosts, what address would be used by external users to reach internal hosts?
    • outside global
    • outside local
    • inside local
    • inside global

  22. The exhibit shows a network topology. PC1 and PC2 are connected to the Fa0/1 and Fa0/2 ports of the SW1 switch, respectively. SW1 is connected through its Fa0/3 port to the Fa0/0 interface of the RT1 router. RT1 is connected through its Fa0/1 to the Fa0/2 port of SW2 switch. SW2 is connected through its Fa0/1 port to the PC3.

    Refer to the exhibit. PC1 issues an ARP request because it needs to send a packet to PC2. In this scenario, what will happen next?

    • SW1 will send an ARP reply with the PC2 MAC address.
    • PC2 will send an ARP reply with its MAC address.
    • RT1 will send an ARP reply with its Fa0/0 MAC address.
    • RT1 will send an ARP reply with the PC2 MAC address.
    • SW1 will send an ARP reply with its Fa0/1 MAC address.

  23. Which two characteristics are associated with UDP sessions? (Choose two.)
    • Unacknowledged data packets are retransmitted.
    • Destination devices receive traffic with minimal delay.
    • Destination devices reassemble messages and pass them to an application.
    • Transmitted data segments are tracked.
    • Received data is unacknowledged.

  24. Refer to the exhibit. What is the global IPv6 address of the host in uncompressed format?
    • 2001:0DB8:0000:0000:0BAF:0000:3F57:FE94
    • 2001:0DB8:0000:0BAF:0000:0000:3F57:FE94
    • 2001:DB80:0000:0000:BAF0:0000:3F57:FE94
    • 2001:0DB8:0000:0000:0000:0BAF:3F57:FE94

  25. What is the purpose of the routing process?
    • to provide secure Internet file transfer
    • to convert a URL name into an IP address
    • to forward traffic on the basis of MAC addresses
    • to encapsulate data that is used to communicate across a network
    • to select the paths that are used to direct traffic to destination networks

  26. What is the purpose of ICMP messages?
    • to provide feedback of IP packet transmissions
    • to monitor the process of a domain name to IP address resolution
    • to inform routers about network topology changes
    • to ensure the delivery of an IP packet

  27. What happens if part of an FTP message is not delivered to the destination?
    • The message is lost because FTP does not use a reliable delivery method.
    • The part of the FTP message that was lost is re-sent.
    • The FTP source host sends a query to the destination host.
    • The entire FTP message is re-sent.

  28. What is the primary purpose of NAT?
    • conserve IPv4 addresses
    • allow peer-to-peer file sharing
    • enhance network performance
    • increase network security

  29. Why does a Layer 3 device perform the ANDing process on a destination IP address and subnet mask?
    • to identify the network address of the destination network
    • to identify the host address of the destination host
    • to identify the broadcast address of the destination network
    • to identify faulty frames

  30. Refer to the exhibit. Using the network in the exhibit, what would be the default gateway address for host A in the 192.133.219.0 network?
    • 192.135.250.1
    • 192.133.219.0
    • 192.133.219.1
    • 192.31.7.1

  31. Which three IP addresses are private ? (Choose three.)
    • 192.167.10.10
    • 10.1.1.1
    • 192.168.5.5
    • 172.16.4.4
    • 172.32.5.2
    • 224.6.6.6
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