Concepts of TCP/IP and the Link Layer GCIA Practice Questions (Page 8)

Questions 36–40

1. 36application · medium

   A junior analyst is examining a frame and sees that the destination MAC address is 01:00:5e:00:00:01. Which of the following best describes this address?

   • AIt is a unicast MAC address assigned to a specific network interface.
   • BIt is a locally administered MAC address used for link-local communication.
   • CIt is an IPv4 multicast MAC address mapped from the multicast IP 224.0.0.1.
   • DIt is the Ethernet broadcast address used for ARP requests.
   Reveal Solution Discussion Select an answer first
2. 37foundation · easy

   What is the correct order of decapsulation when a frame is received by a host?

   • ALink layer removes the frame header and trailer, Internet layer removes the IP header, Transport layer removes the TCP/UDP header, Application layer receives the data.
   • BTransport layer removes the IP header, Internet layer removes the TCP header, Link layer removes the frame header.
   • CApplication layer removes its header, Transport layer removes its header, Internet layer removes its header, Link layer removes its header.
   • DAll headers are removed at once by the network interface card.
   Reveal Solution Discussion Select an answer first
4. 38application · medium

   An analyst sees a frame with a destination MAC address of 01:00:5e:00:00:01. The frame's EtherType is 0x0800, and the IP destination is 224.0.0.1. What is the most accurate description of this frame?

   • AIt is a unicast frame sent to a specific host.
   • BIt is an ARP request frame.
   • CIt is a multicast frame intended for hosts subscribed to the multicast group 224.0.0.1.
   • DIt is a broadcast frame sent to all hosts on the local network.
   Reveal Solution Discussion Select an answer first
5. 39application · medium

   A server hosts multiple services: SSH on port 22, HTTP on port 80, and HTTPS on port 443. A packet arrives at the server's IP address with a destination port of 443. How does the operating system determine which application should receive the data?

   • AIt uses the MAC address to route the packet to the application.
   • BIt uses the IP protocol field to determine the application.
   • CIt uses the source port number to identify the application.
   • DIt uses the destination port number to demultiplex the packet to the correct application.
   Reveal Solution Discussion Select an answer first
6. 40foundation · easy

   What is the primary purpose of port numbers in the transport layer?

   • ATo identify the network interface of a host
   • BTo route packets between different networks
   • CTo ensure reliable delivery of data
   • DTo identify the application or process that should receive the data
   Reveal Solution Discussion Select an answer first