1. In which of the following penetration testing models, no information about the network is given to the tester?
a. White box model.
b. Black box model.
c. Gray box model.
d. Red box model.
Answer :- b
2. Which of the following statements) is/are true for a circuit switched network?
a. A communication link may be shared by more than connection.
b. A communication link is dedicated to a connection and cannot be shared with other connections.
c. The packet transfer delay between a pair of nodes may depend on the prevailing network traffic.
d. It is more efficient for bursty traffic.
Answer :- b
3. Which of the following statements) is/are false for virtual circuit based packet transfer approach?
a. It is a connection-oriented approach, where a route is established priori to transfer of packets.
b. The intermediate node can perform dynamic routing.
c. All the packets reach in order to the destination.
d. It is a true packet switched network.
Answer :- b, d
4. A packet of size 2000 bytes is sent over a 50 kilo-bits-per-second (Kbps) point-to-point link whose propagation delay is 5 msec. The packet will reach the destination after__________msec. (Assume 1K = 1000)
Answer :- 323,327
5. Which of the following OS layers is responsible for end-to-end reliable data transfer?
a. Physical layer
b. Transport layer
c. Network layer
d. Datalink layer
Answer :- b
6. Which of the following statements) is/are true for the IP address?
a. It uniquely identifies a network interface of a computer system.
b. It uniquely identifies a host in the network.
c. It indicates how many hardware ports are there in the computer system.
d. None of these.
Answer :- b
7. How many bits are used for IP address (in IPv4) and port number respectively?
a. 32, 8
b. 32, 16
C. 128, 8
d. 128, 16
Answer :- b
8. Which of the following is not a valid port numbers in TCP/IP?
a. 21
b. 80
c. 443
d. 8080
e. 80800
Answer :- e
9. If the IP header is 224 bits long, what will be the value of the “HLEN” field (in decimal)_________?
Answer :- 7
10. The minimum size of IP header required in an IP datagram is_______bytes.
Answer :- 20
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