Review of Information Network and Technology
Subject: Computer Networks
Sample Practice Questions
Question 1: Traditional LANs run at the speeds of _____________
- 100 to 10000 Mbps
- 100 to 1000 Mbps
- 10 to 100 Mbps
- 10 to 1000 Mbps
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.
Question 2: A local area network is generally a public owned communications network within a limitless geographical area.
- True
- False
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.
Question 3: The transmission channels in LAN generally use __________ cables.
- fiber optic
- twisted pair
- unshielded twisted pair
- shielded twisted pair
Explanation: There are several types of cables used in LAN. The most commonly used cables for transmission channels in LAN are UTP (Unshielded Twisted Pair) due to their low cost and ease of installation.
Question 4: _______ standard is used by Wireless LAN.
- IEEE 802.3
- IEEE 802.11
- IEEE 802.2
- IEEE 802.5
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.
Question 5: _________ is a Wireless LAN technology.
- Public Switched Telephone Network (PSTN)
- Cable Television
- Bluetooth
- Internet Access
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.
Question 6: Data Link technology for Local Area Networks (LAN) is _________
- hybrid
- fully connected
- mesh
- token ring
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.
Question 7: 100BaseT4 networks are wired together using ____________
- unshielded twisted pair (UTP)
- twisted pair
- co-axial cable
- fiber optic cable
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.
Question 8: Collision detection in LAN can be achieved by CSMA/CA.
- True
- False
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.
Question 9: __________ is a type of LAN data transmission.
- VLAN
- Unicast
- Simulcast
- Cablecast
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.
Question 10: A repeater is a _________ layer device.
- data link
- application
- network
- physical
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.