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Hassan
1.What is a primary function of the trailer information added by the data link layer encapsulation?
A. Supports error detection
B. Ensures ordered arrival of data
C. Identifies the devices on the local network
D. Supports error detection
2.Error detection at the data link layer is achieved by?
A. Bit stuffing
B. Cyclic redundancy codes
C. Hamming codes
D. Bit stuffing
3.Which of the following devices is a PC component that connects the computer to the network?
A. Bridge
B. NIC (Network Interface Card)
C. DNS Server
D. Bridge
4.Switch is a Device of _________ Layer of OSI Model.?
A. Network Layer
B. Data Link Layer
C. Application Layer
D. Network Layer
5.HUB is a _________ Device and Switch is a ________ Device.?
A. Unicast, Multicast
B. Malticast, Unicast
C. Broadcast, Unicast
D. Unicast, Multicast
6.Which one of the following task is not done by data link layer?
A. framing
B. error control
C. flow control
D. framing
7.Which sublayer of the data link layer performs data link functions that depend upon the type of medium?
A. logical link control sublayer
B. media access control sub-layer
C. network interface control sublayer
D. logical link control sublayer
8.Header of a frame generally contains?
A. synchronization bytes
B. addresses
C. frame identifier
D. synchronization bytes
9.Automatic repeat request error management mechanism is provided by?
A. logical link control sublayer
B. media access control sublayer
C. network interface control sublayer
D. logical link control sublayer
10.When 2 or more bits in a data unit has been changed during the transmission, the error is called?
A. random error
B. burst error
C. inverted error
D. random error
11.Which one of the following is the multiple access protocol for channel access control?
A. CSMA/CD
B. CSMA/CA
C. both (a) and (b)
D. CSMA/CD
12.The technique of temporarily delaying outgoing outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called?
A. piggybacking
B. cyclic redundancy check
C. fletcher’s checksum
D. piggybacking
13.How the error detection is achieved at data link layer?
A. Hamming codes
B. Bit stuffing
C. Detection manager
D. Hamming codes
14.The technique of temporarily delaying outgoing outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called?
A. piggybacking
B. cyclic redundancy check
C. fletcher’s checksum
D. piggybacking
15.Switch operates at second layer of OSI model that is _______layer.?
A. Physical layer
B. Network layer
C. Data link layer
D. Physical layer
16.Bridge works in which layer of the OSI model?
A. Application layer
B. Transport layer
C. Network layer
D. Application layer
17.MAC Address is used by which layer ?
A. Transport Layer
B. Data Link Layer
C. Application Layer
D. Transport Layer
18.Layer-2 Switch is also called?
A. Multiport Bridge
B. Multiport Hub
C. Multiport Switch
D. Multiport Bridge
19.____________ is added to data packet for error detection.?
A. checksum bit
B. error bit
C. parity bit
D. checksum bit
20.Which error detection method uses one's complement arithmetic?
A. Simple parity check
B. Two-dimensional parity check
C. CRC
D. Simple parity check
21.____________ is added to data packet for error detection.?
A. checksum bit
B. error bit
C. parity bit
D. checksum bit
22.When a host on network A sends a message to a host on network B, which address does the router look at?
A. port
B. logical
C. physical
D. port
23.How long is an IPv6 address?
A. 32 bits
B. 128 bits
C. 128 bytes
D. 32 bits
24.Which router command allows you to view the entire contents of all access lists?
A. show all access-lists
B. show access-lists
C. show ip interface
D. show all access-lists
25.What PPP protocol provides dynamic addressing, authentication, and multilink?
A. NCP
B. HDLC
C. X.25
D. NCP
26.Which of the following is private IP address?
A. 192.168.24.43
B. 168.172.19.39
C. 172.15.14.36
D. 192.168.24.43
27.Which class of IP address provides a maximum of only 254 host addresses per network ID?
A. Class A
B. Class B
C. Class C
D. Class A
28.Which of the following devices direct network traffic based not by MAC addresses but by software-configured network addresses?
A. Router
B. Hub
C. Bridge
D. Router
29.Which of the following network devices/systems translates data from one format to another?
A. Hub
B. DHCP Server
C. Gateway
D. Hub
30.Which of the following terms is used to describe a hardware- or software-based device that protects networks from outside threats?
A. NICcc
B. Gateway
C. Firewall
D. NICcc
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