This set of Computer Network Management Multiple Choice Questions & Answers (MCQs) focuses on “Local Area Networks”.
1. Traditional LANs run at the speeds of _____________
a) 100 to 10000 Mbps
b) 100 to 1000 Mbps
c) 10 to 100 Mbps
d) 10 to 1000 Mbps
View Answer
Explanation: LAN is a configuration that supports personal computers. It is highly reliable for a limited geographical area. The speed of LAN is limited from 10 to 100 Mbps. This is enough to satisfy the high volume demand.
2. A local area network is generally a public owned communications network within a limitless geographical area.
a) True
b) False
View Answer
Explanation: A local area network (LAN) is a private network. It is limited to a specific area. WAN on the other hand is used for extremely large geographical areas.
3. The transmission channels in LAN generally use __________ cables.
a) fiber optic
b) twisted pair
c) unshielded twisted pair
d) shielded twisted pair
View Answer
Explanation: There are several types of cables used in LAN. The cost is reduced in LAN technologies due to less number of connections. The most commonly used cables for transmission channels in LAN are Fiber optic cables.
4. _______ standard is used by Wireless LAN.
a) IEEE 802.3
b) IEEE 802.11
c) IEEE 802.2
d) IEEE 802.5
View Answer
Explanation: IEEE 802.11 specifies the set of protocols for implementing Wireless LAN (WLAN). IEEE 802.3 standard is for bus networks. IEEE 802.3 standard defines the MAC layer and Physical layer of the Ethernet. Hence it forms the foundation for the specification of Ethernet protocol. IEEE 802.2 standard is used for specifying logical link control above the Data Link Layer of the OSI model. IEEE 802.5 standard is used for Token-ring topology.
5. _________ is a Wireless LAN technology.
a) Public Switched Telephone Network (PSTN)
b) Cable Television
c) Bluetooth
d) Internet Access
View Answer
Explanation: Bluetooth is one example of Wireless LAN technology that is used for exchanging data over short distances. It also provides secure wireless communications. PSTN, Cable Television and Internet Access are wired technologies.
6. Data Link technology for Local Area Networks (LAN) is _________
a) hybrid
b) fully connected
c) mesh
d) token ring
View Answer
Explanation: Token Ring Technology gives specifications for communication protocols in LANs. This technology is more deterministic than Ethernet. It uses Ring topology. This is the only option referring to a technology whereas Hybrid, Fully Connected and Mesh refers to Network topologies.
7. 100BaseT4 networks are wired together using ____________
a) unshielded twisted pair (UTP)
b) twisted pair
c) co-axial cable
d) fiber optic cable
View Answer
Explanation: 100BaseT4 is one of the three types of Ethernet cable. These physical wiring can carry up to 100 Mbps. 100BaseT4 networks uses Star topology for its connections.
8. Collision detection in LAN can be achieved by CSMA/CA.
a) True
b) False
View Answer
Explanation: Collision detection is a process that helps in detecting the collision/interference of two data packets in a network. Thus CSMA/CD (Carrier Sense Multiple Access/Collision Detection) is method used for the same in LANs. Whereas CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) is used for avoiding or preventing those collisions.
9. __________ is a type of LAN data transmission.
a) VLAN
b) Unicast
c) Simulcast
d) Cablecast
View Answer
Explanation: Data transmission in LAN comes under three types. Those are unicast, multicast, and broadcast. The data packets are sent in the form of a network frame to a node and further it is transmitted on the basis of topology.
10. A repeater is a _________ layer device.
a) data link
b) application
c) network
d) physical
View Answer
Explanation: In an extended network repeaters are used to connect media elements. These repeaters operate on the physical layer of the OSI model. It removes noise from a signal.
11. In a Broadcast transmission __________
a) a packet is transmitted from a source to many destinations on the network
b) a single packet is transmitted from a source to a destination on the network
c) a packet is transmitted from many sources to one destination on the network
d) a single packet is copied and sent to all nodes on the network
View Answer
Explanation: In LANs the data transmission methods are classified into three types. Those are unicast, multicast, and broadcast. In unicast, a frame is sent from one node to another on a network. In broadcast, a frame or data packet is transmitted from one node to all other nodes on the network. Lastly, in a multicast, the frames are carried in a network to many receivers at the same time.
12. ___________ device is used for connecting LAN.
a) Routers
b) Ethernet
c) Servers
d) Bridge
View Answer
Explanation: Bridges are also known as LAN Switches. Bridges are used for connecting two or more LANs. It also helps in forwarding the data packets to these networks.
13. The networks that needs central monitoring, still uses __________
a) smart terminal
b) intelligent terminal
c) simple terminal
d) dumb terminal
View Answer
Explanation: There are three significant types of Terminals used by LAN. Those are smart terminal, intelligent terminal and dumb terminal. The dumb terminal does not carry out the function of data processing. In central monitoring systems we need terminals that will just carry out the tasks of sending and receiving data packets. Thus dumb terminal is used in such networks.
14. Collisions are improbable in _________ networks.
a) Token Ring
b) Token-passing
c) Ethernet
d) Hybrid
View Answer
Explanation: Token passing is a channel access method used in Local Area Networks (LANs). It helps in preventing collision in the network. This method uses Ring topology.
15. The diagram below represents ___________ type of data transmission in LAN.
a) multicast
b) unicast
c) broadcast
d) cablecast
View Answer
Explanation: The given diagram is that of a multicast data transmission. There are three different types of data transmission in LAN and those are unicast, multicast, and broadcast. Multicast is somewhat similar to broadcast.
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