Computer Networks

Which layer of the OSI model is responsible for end-to-end communication and provides services like encryption and decryption?
— A. Transport Layer
— B. Presentation Layer
— C. Application Layer
— D. Session Layer
— Correct Answer: B

What is the purpose of ICMP (Internet Control Message Protocol)?
— A. To encapsulate data for transmission
— B. To manage network traffic congestion
— C. To diagnose network-related issues
— D. To establish a secure connection
— Correct Answer: C

What is the purpose of DHCP (Dynamic Host Configuration Protocol)?
— A. To encrypt network communication
— B. To assign IP addresses dynamically to devices
— C. To manage network security
— D. To establish a secure tunnel
— Correct Answer: B

What does the term “bandwidth” refer to in networking?
— A. The speed of data transmission
— B. The distance between devices in a network
— C. The number of devices in a network
— D. The size of network packets
— Correct Answer: A

What is the purpose of a proxy server in networking?
— A. To manage IP addresses
— B. To filter and forward network traffic
— C. To assign MAC addresses dynamically
— D. To encrypt network communication
— Correct Answer: B

Which TCP/IP protocol is responsible for ensuring the reliable delivery of data packets?
— A. IP
— B. UDP
— C. TCP
— D. ICMP
— Correct Answer: C

In networking, what does the term “ping” refer to?
— A. Testing network connectivity
— B. Filtering network traffic
— C. Assigning IP addresses
— D. Managing network security
— Correct Answer: A

Which of the following is a valid IPv4 address?
— A. 192.256.1.1
— B. 172.31.0.1
— C. 300.100.50.25
— D. 500.10.5.2
— Correct Answer: B

Which network device operates at the Data Link Layer (Layer 2) of the OSI model?
— A. Router
— B. Hub
— C. Switch
— D. Firewall
— Correct Answer: C ( Hubs performs similar task but at physical layer)