2.3.8 Practice Questions

Question: Which of the following is the process of breaking a message into packets, adding controls and other information, and then transmitting the message through the transmission medium?

Transformation

Sequencing

Segmentation

Encapsulation

Answer: Encapsulation

Question: What is the purpose of a frame check sequence (FCS) footer?

Correct Answer:

Checksum error detection

Answer: Checksum error detection

Question: Which term does the OSI model use that’s different from the TCP/IP model in reference to the terms frame, packet, and segment?

Protocol data unit (PDU)

Answer: Protocol data unit (PDU)

Question: Match each TCP/IP layers with its function.

Breaks the data into pieces.

Transport

Prepares the data to be sent.

Application

Adds physical addesses.

Link

Adds logical addresses.

Internet

Answer: Breaks the data into pieces.

Transport

Prepares the data to be sent.

Application

Adds physical addesses.

Link

Adds logical addresses.

Internet

Question: Workstation2 needs to send data to Workstation3. Identify the Layer 2 and Layer 3 addresses Workstation2 will use to send the data by dragging the corresponding address from the list on the left to its location on the right.

Answer: Layer 2 source address

080046987654

Layer 3 source address

192.168.10.12

Layer 2 destination address

000b5f2a2222

Layer 3 destination address

192.168.11.11

Question:

Answer: Layer 2 source address

000b5f2a2222

Layer 3 source address

192.168.11.11

Layer 2 destination address

080046987654

Layer 3 destination address

192.168.10.12

Question: What role does ARP play in the routing process?

Answer: If a router does not know a destination device’s MAC address, it sends an ARP broadcast containing the destination device’s IP address and requesting its MAC address.

Question: Routing data between computers on a network requires several mappings between different addresses. Which of the following statements is true?

Routers use ARP to resolve known IP addresses into MAC addresses.

Answer: Routers use ARP to resolve known IP addresses into MAC addresses.

Question: During network transmission, data is transferred to various routers, which forward the data to the appropriate network. If the source and destination network addresses reside on the same network, which protocol is used to determine the destination IP’s MAC address?

Answer: ARP

Question: TCP is a connection-oriented protocol that uses a three-way handshake to establish a connection to a system port. Computer 1 sends a SYN packet to Computer 2. Which packet does Computer 2 send back?

Answer: SYN/ACK