Computer Networks
1. Which layer is responsible for transmitting individual bits from one node to the next?
a) Physical layer b) data link layer c) transport layer d) application layer
2. In which topology, each computer is directly connected to primary network cable in a single line?
a) BUS topology b) STAR topology c) Ring topology d) Mesh topology
3. What are the key elements of protocol?
a) Syntax b) semantics c) timing d) all the three
4. Which network provides data communication system covering an area, the size of a city or town?
a) LAN b) WAN c) MAN
5. Which class has the range of internet addresses 192.0.0.0 - 223.255.255.255?
a) Class A b) Class B c) Class C d) Class D
6. Which wireless media that transport electromagnetic waves without using a physical conductor?
a) Guided media b) unguided media c) both of these d) none of these
7. Which layer is responsible for transmitting frames from one node to the next?
a) Physical layer b) data link layer c) transport layer d) application layer
8. Which one of the following not belongs to guided media?
a) twisted-pair b) coaxial c) fiber-optic d) microwave
9. A digital signal has a bit rate of 2000 bps. What is the duration of each bit (in microseconds)?
a) 250 b) 500 c) 1000 d) 2000
10. Consider a noiseless channel with a bandwidth of 3000 HZ transmitting a signal with eight signal levels, what is the maximum bit rate (in bps)?
a) 12,000 b) 40,000 c) 18,000 d) 24,000
11. A signal has four data levels with pulse duration of 1ms.calculate the bit rate (in bps)?
a) 4000 b) 2000 c) 6000 d) 8000
12. In which mode each station can function as a primary and a secondary?
a) ABM b) NRM c) both of these d) none of these
13. How many frame types are available in HDLC?
a) 4 b) 3 c) 2
a) 4 b) 3 c) 2
14) Connection at the network layer is?
a) Connectionless b) connection oriented
15. In OSI, terminal emulation is done in (HCL)?
a) Session b) application c) transport d) presentation
16. Piggy backing is a technique for
a) Flow control b) sequence c) Acknowledgement d) retransmission
17. CSMA/CD is used in
a) Token ring b) FDDI c) HDLC d) Ethernet
a) Token ring b) FDDI c) HDLC d) Ethernet
18. FDDI belongs to which network?
a) BUS b) STAR c) Ring d) Mesh
a) BUS b) STAR c) Ring d) Mesh
19. The acronym DAN stands for
a) Data access network b) Distributed area network c) Desktop area network d) Disk access node
20. IP-address is a n-bit address, what is the value of n?
a) 16 b) 32 c) 8
21. What is the first byte value in class D addressing?
a) 1111 b) 1110 c) 110 d) 1100
22. How many bytes are allocated for Net id in class C?
a) 1 b) 2 c) 3 d) 4
a) 1 b) 2 c) 3 d) 4
23. Find the network address of 132.6.17.85?
a) D b) C c) B d) A
a) D b) C c) B d) A
24) In which topology, computers are connected in loop?
a) BUS topology b) STAR topology c) Ring topology d) Mesh topology
25. Which layer is responsible for source to destination delivery of a packet?
a) Physical layer b) data link layer c) transport layer d) network layer
Comments
Post a Comment