Q1: CSMA/CA was invented mainly for which type of networks?
(A) Wired Networks
(B) Wireless Networks
(C) Satellite Networks
(D) Optical Networks
Answer: (B) Wireless Networks
Q2: In polling method, which station controls all communication?
(A) Secondary station
(B) Router
(C) Primary station
(D) Hub
Answer: (C) Primary station
Q3: A switch works in which layers of the OSI model?
(A) Physical layer only
(B) Data link layer only
(C) Physical and Data link layers
(D) Network layer
Answer: (C) Physical and Data link layers
Q4: A hub operates in which OSI layer?
(A) Physical layer
(B) Data link layer
(C) Network layer
(D) Transport layer
Answer: (A) Physical layer
Q5: How many types of HDLC frames are defined?
(A) Two
(B) Three
(C) Four
(D) Five
Answer: (B) Three
Q6: Which of the following are HDLC frame types?
(A) Information, Supervisory, Unnumbered
(B) Data, Control, Error
(C) Packet, Frame, Segment
(D) Request, Response, Acknowledge
Answer: (A) Information, Supervisory, Unnumbered
Q7: IEEE 802.11 is related to:
(A) Wired LAN
(B) Wireless LAN
(C) Satellite Network
(D) Optical Fiber Network
Answer: (B) Wireless LAN
Q8: Error detection checks:
(A) Exact number of errors
(B) Location of errors
(C) Whether error occurred or not
(D) Corrects the error
Answer: (C) Whether error occurred or not
Q9: Error correction determines:
(A) Only presence of error
(B) Exact number and location of errors
(C) Only burst errors
(D) None of these
Answer: (B) Exact number and location of errors
Q10: How many types of frames exist in Wireless LAN?
(A) Two
(B) Three
(C) Four
(D) Five
Answer: (B) Three
Q11: Types of frames in wireless LAN are:
(A) Control, Management, Data
(B) Frame, Packet, Segment
(C) Request, Reply, Acknowledge
(D) Data, Error, Control
Answer: (A) Control, Management, Data
Q12: Controlled access methods include:
(A) Reservation
(B) Polling
(C) Token Passing
(D) All of these
Answer: (D) All of these
Q13: Carrier that handles Intra-LATA traffic is called:
(A) IXC
(B) LEC
(C) ISP
(D) TCP
Answer: (B) LEC
Q14: Attenuation means:
(A) Increase in signal power
(B) Loss of signal energy
(C) Error in signal
(D) Signal duplication
Answer: (B) Loss of signal energy
Q15: Unit of attenuation is:
(A) Volt
(B) Ampere
(C) Decibel
(D) Hertz
Answer: (C) Decibel
Q16: SONET defines how many layers?
(A) Two
(B) Three
(C) Four
(D) Five
Answer: (C) Four
Q17: Which of the following is a random access protocol?
(A) ALOHA
(B) CSMA/CD
(C) CSMA/CA
(D) All of these
Answer: (D) All of these
Q18: Which protocol is a controlled access method?
(A) ALOHA
(B) Polling
(C) CSMA/CD
(D) CSMA/CA
Answer: (B) Polling
Q19: Router operates at which OSI layer?
(A) Physical
(B) Data Link
(C) Network
(D) Transport
Answer: (C) Network
Q20: Standard Ethernet speed is:
(A) 1 Mbps
(B) 10 Mbps
(C) 100 Mbps
(D) 1 Gbps
Answer: (B) 10 Mbps
Q21: Fast Ethernet speed is:
(A) 10 Mbps
(B) 50 Mbps
(C) 100 Mbps
(D) 1 Gbps
Answer: (C) 100 Mbps
Q22: VLAN stands for:
(A) Virtual Local Area Network
(B) Variable LAN
(C) Visual LAN
(D) Virtual Link Access Network
Answer: (A) Virtual Local Area Network
Q23: DSL is used for:
(A) Satellite communication
(B) High speed internet over telephone lines
(C) Wireless LAN
(D) Cable television
Answer: (B) High speed internet over telephone lines
Q24: Parity-Check code is mainly used for:
(A) Encryption
(B) Error detection
(C) Data compression
(D) Routing
Answer: (B) Error detection
Q25: Variable-Sized framing has how many types?
(A) One
(B) Two
(C) Three
(D) Four
Answer: (B) Two