Common Network Protocols GNFA Practice Questions (Page 11)

Questions 51–55

1. 51application · easy

   A network analyst is explaining to a junior analyst why a packet capture shows an ARP request before a TCP handshake. Which layer of the TCP/IP model is responsible for the ARP request?

   • AInternet layer
   • BApplication layer
   • CTransport layer
   • DNetwork Access layer (Link layer)
   Reveal Solution Discussion Select an answer first
2. 52foundation · easy

   Which of the following protocols uses both TCP and UDP port 53?

   • ADHCP
   • BSNMP
   • CDNS
   • DFTP
   Reveal Solution Discussion Select an answer first
4. 53foundation · easy

   Which statement correctly describes a key difference between IPv4 and IPv6 addressing?

   • AIPv6 includes a built-in security feature that makes encryption mandatory for all traffic.
   • BIPv6 addresses are written in dotted-decimal notation, while IPv4 uses hexadecimal notation.
   • CIPv6 has a much larger address space than IPv4, providing more available addresses.
   • DIPv4 addresses are 128 bits long, while IPv6 addresses are 32 bits long.
   Reveal Solution Discussion Select an answer first
5. 54expert · hard

   A network analyst is troubleshooting a connectivity issue in a mixed IPv4/IPv6 network. A Windows host is unable to reach a server on the same subnet. The analyst captures traffic and sees the host sending Neighbor Solicitation (NS) messages for the server's IPv6 address, but no Neighbor Advertisement (NA) is received. What is the most likely cause?

   • AThe server is using a link-local address that is not reachable from the host's subnet.
   • BThe server is not responding to Neighbor Solicitation because it is not configured with the target IPv6 address or is on a different VLAN.
   • CThe host is using the wrong IPv6 address for the server, but the server is responding with a Neighbor Advertisement that is being dropped by the host's firewall.
   • DThe network is using IPv4 only, and the host is incorrectly sending IPv6 Neighbor Discovery messages.
   Reveal Solution Discussion Select an answer first
6. 55application · medium

   An analyst is investigating a data exfiltration incident. The capture shows a client connecting to an external server on TCP port 25, sending a series of commands, and then receiving responses. The analyst also observes the client authenticating with a username and password. Which protocol is the client using, and what is its primary role in this scenario?

   • AFTP, used to transfer files between the client and the server.
   • BPOP3, used to retrieve email messages from the server to the client.
   • CSMTP, used to send email messages from the client to the server for relay.
   • DIMAP, used to synchronize email folders between the client and server.
   Reveal Solution Discussion Select an answer first