Top 1000+ Solved Computer Networks MCQ Questions Answer
Q. Which of the following network access standard is used for connectingstations to a circuit-switched network?
a. X.3
b. X.21
c. X.25
d. X.75
Q. In OSI model, which of the following layer provides error-free delivery ofdata?
a. Data link
b. Network
c. transport
d. Session
Q. To avoid transmission errors, a check figure is calculated by the
a. transmitting computer
b. receiving computer
c. both (a) and (b)
d. Start and stop bit
Q. What is the first octet range for a class A IP address?
a. 1 - 126
b. 192 - 255
c. 192 - 223
d. 1 - 127
Q. CSMA (Carrier Sense Multiple Access) is
a. a method of determining which device has access to the transmission medium at any time
b. a method access control technique for multiple-access transmission media.
c. a very common bit-oriented data link protocol issued by ISO.
d. network access standard for connecting stations to a circuit-switched network
Q. What is the first octet range for a class B IP address?
a. 128 - 255
b. 1 - 127
c. 192 - 223
d. 128 - 191
Q. ARP (Address Resolution Protocol) is
a. a TCP/IP protocol used to dynamically bind a high level IP Address to a lowlevel physical hardware address
b. a TCP/IP high level protocol for transferring files from one machine to another
c. a protocol used to monitor computers
d. a protocol that handles error and control messages
Q. The 802.5 standard implements a way for preventing collisions on thenetwork. How are collisions prevented when using this standard?
a. CSMA/CD
b. Token passing
c. Collision detection
d. Time sharing
Q. Terminals are required for
a. real time, batch processing, and timesharing
b. real time, timesharing, and distributed processing
c. real time, distributed processing, and manager inquiry
d. real time, timesharing, and message switching
Q. What OSI layer handles logical address to logical name resolution?
a. Transport
b. Physical
c. Presentation
d. Data Link
Q. Consider different activities related to email.m1:Send an email from a mail client to mail server m2:Download an email from mailbox server to a mail client m3:Checking email in a web browser Which is the applicable level protocol user in each activity?
a. m1:HTTP, m2:SMTP, m3:POP
b. m1:SMTP, m2:FTP, m3:HTTP
c. m1:SMTP, m2:POP, m3:HTTP
d. m1:POP, m2:SMTP, m3:IMAP
Q. One of the header fields in an IP datagram is the Time to Live (TTL) field. Which of the following statements best explains the need for this field?
a. It can be used to prioritize packets
b. It can be used to reduce delays
c. It can be used to optimize throughput
d. It can be used to prevent packet looping
Q. Which of the following system calls results in the sending of SYNpackets?
a. socket
b. bind
c. listen
d. connect
Q. In the slow start phase of the TCP congestion control algorithm, the size ofthe congestion window
a. does not increase
b. increases linearly
c. increases quadratically
d. increases exponentially