Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 165
Q2421:
What type of protocol is CHAP classified as?
A. Connection-oriented
B. Challenge-response
C. One-time password
D. Encryption protocol
Correct Answer:
B
Chapter: 165
Q2422:
What makes CHAP more secure than PAP?
A. It encrypts the link
B. It uses static passwords
C. It uses a challenge-response mechanism
D. It relies on firewalls
Correct Answer:
C
Chapter: 165
Q2423:
Which PPP authentication protocol is vulnerable to replay attacks due to clear-text password transmission?
A. CHAP
B. IPSec
C. PAP
D. HTTPS
Correct Answer:
C
Chapter: 165
Q2424:
Fill in the blank: CHAP stands for ______.
A. Control Handshake Authentication Protocol
B. Central Host Access Protocol
C. Challenge Handshake Authentication Protocol
D. Coding Host Authentication Procedure
Correct Answer:
C
Chapter: 165
Q2425:
What role do PAP and CHAP serve in PPP?
A. Data encryption
B. Address resolution
C. Authentication
D. Link encapsulation
Correct Answer:
C
Chapter: 165
Q2426:
Which of the following protocols is responsible for handling multiple network-layer protocols in PPP?
A. PAP
B. LCP
C. NCP
D. CHAP
Correct Answer:
C
Chapter: 165
Q2427:
Which protocol family handles IP configuration and support within PPP?
A. PAP
B. NCP
C. LCP
D. IPSec
Correct Answer:
B
Chapter: 165
Q2428:
Fill in the blank: ______ protocols allow PPP to support multiple network-layer protocols like IP, IPX, and AppleTalk.
A. Authentication
B. Framing
C. Network Control
D. Address Resolution
Correct Answer:
C
Chapter: 165
Q2429:
What is the function of NCP in PPP?
A. Encrypts data
B. Configures and enables different network-layer protocols
C. Handles flow control
D. Performs DNS lookups
Correct Answer:
B
Chapter: 165
Q2430:
Which PPP protocol is responsible for negotiating options for network-layer protocols?
A. NCP
B. CHAP
C. PAP
D. UDP
Correct Answer:
A
Chapter: 165
Q2431:
PPP supports how many types of authentication protocols?
A. 1
B. 2
C. 3
D. 4
Correct Answer:
B
Chapter: 165
Q2432:
Fill in the blank: Authentication protocols in PPP are used to ______ the identity of the peer.
A. encrypt
B. validate
C. hash
D. monitor
Correct Answer:
B
Chapter: 165
Q2433:
Which of these is NOT an authentication protocol in PPP?
A. PAP
B. CHAP
C. SMTP
D. None of the above
Correct Answer:
C
Chapter: 165
Q2434:
CHAP typically uses which cryptographic technique to ensure secure authentication?
A. Plain-text password
B. MD5 hash
C. Base64 encoding
D. None of these
Correct Answer:
B
Chapter: 166
Q2435:
Which of the following is handled by the Media Access Control (MAC) sub-layer?
A. Physical addressing
B. Flow control
C. Error detection
D. Access control
Correct Answer:
D
Chapter: 166
Q2436:
Fill in the blank: The Media Access Control (MAC) sub-layer handles _______ in a shared communication link.
A. flow control
B. addressing
C. access control
D. traffic management
Correct Answer:
C
Chapter: 166
Q2437:
Which of the following is a key function of the MAC sub-layer?
A. Establishing physical connections
B. Providing error-free communication
C. Coordinating access to the shared link
D. Encrypting the data
Correct Answer:
C
Chapter: 166
Q2438:
Which protocol handles access control for shared communication links in the MAC sub-layer?
A. TCP/IP
B. HTTP
C. Multiple-access protocols
D. SMTP
Correct Answer:
C
Chapter: 166
Q2439:
Fill in the blank: In a shared communication link, the MAC sub-layer ensures that nodes _______ the link.
A. ignore
B. control access
C. to not access
D. avoid
Correct Answer:
B
Chapter: 166
Q2440:
What is the main purpose of a multiple-access protocol?
A. To ensure reliable data transfer
B. To coordinate access to a shared link
C. To handle error correction
D. To control the flow of data
Correct Answer:
B