Networking - TCP/IP

Exercise :: TCP/IP - TCP/IP

  • TCP/IP - TCP/IP
6. 

Which of the following allows a router to respond to an ARP request that is intended for a remote host?

A. Gateway DP
B. Reverse ARP (RARP)
C. Proxy ARP
D. Inverse ARP (IARP)

Answer: Option C

Explanation:

Proxy ARP can help machines on a subnet reach remote subnets without configuring routing or a default gateway.

7. 

The DoD model (also called the TCP/IP stack) has four layers. Which layer of the DoD model is equivalent to the Network layer of the OSI model?

A. Application
B. Host-to-Host
C. Internet
D. Network Access

Answer: Option C

Explanation:

The four layers of the DoD model are Application/Process, Host-to-Host, Internet, and Network Access. The Internet layer is equivalent to the Network layer of the OSI model.

8. 

Which of the following services use UDP?

  1. DHCP
  2. SMTP
  3. SNMP
  4. FTP
  5. HTTP
  6. TFTP

A. 1, 3 and 6
B. 2 and 4
C. 1, 2 and 4
D. All of the above

Answer: Option A

Explanation:

DHCP, SNMP, and TFTP use UDP.

9. 

Which class of IP address provides a maximum of only 254 host addresses per network ID?

A. Class A
B. Class B
C. Class C
D. Class D

Answer: Option C

Explanation:

A Class C network address has only 8 bits for defining hosts: 28 - 2 = 254.

10. 

If you use either Telnet or FTP, which is the highest layer you are using to transmit data?

A. Application
B. Presentation
C. Session
D. Transport

Answer: Option A

Explanation:

Both FTP and Telnet use TCP at the Transport layer; however, they both are Application layer protocols, so the Application layer is the best answer.