network

1. Computer Networks
1. Which of the following is not a type of network topology?
a) Star
b) Ring
c) Mesh
d) Square
2. Which layer of the OSI model is responsible for data formatting and encryption?
a) Physical layer
b) Data Link layer
c) Transport layer
d) Presentation layer
3. Which protocol is used for sending email over the Internet?
a) HTTP
b) SMTP
c) FTP
d) TCP
4. What is the maximum data transmission rate of a Gigabit Ethernet connection?
a) 100 Mbps
b) 1 Gbps
c) 10 Gbps
d) 100 Gbps
5. What is the purpose of ARP (Address Resolution Protocol)?
a) To convert IP addresses to MAC addresses
b) To convert MAC addresses to IP addresses
c) To resolve domain names to IP addresses
d) To resolve IP addresses to domain names
6. Which device is used to connect multiple computers in a LAN?

2. a) Router
b) Modem
c) Switch
d) Hub
7. What is the default subnet mask for a Class C IP address?
a) 255.255.0.0
b) 255.255.255.0
c) 255.0.0.0
d) 255.255.255.255
8. Which routing algorithm is used by RIP (Routing Information Protocol)?
a) Dijkstra's algorithm
b) Bellman-Ford algorithm
c) Link-state routing algorithm
d) Distance-vector routing algorithm
9. Which of the following is not a type of wireless network?
a) LAN
b) WAN
c) PAN
d) WLAN
10. What is the maximum range of Bluetooth technology?
a) 10 meters
b) 30 meters
c) 100 meters
d) 300 meters
11. What is the main advantage of using UDP (User Datagram Protocol) over TCP (Transmission
Control Protocol)?
a) Connection-oriented communication

3. b) Error checking and correction
c) Low overhead
d) Guaranteed delivery of packets
12. What is the primary function of a DNS server?
a) To route data packets between networks
b) To translate domain names into IP addresses
c) To encrypt data for secure transmission
d) To authenticate users accessing a network
13. Which protocol is used to retrieve email from a remote server?
a) SMTP
b) POP3
c) IMAP
d) HTTP
14. Which of the following is not a valid IP address class?
a) Class A
b) Class B
c) Class C
d) Class D
15. What is the purpose of NAT (Network Address Translation)?
a) To convert private IP addresses to public IP addresses
b) To encrypt data for secure transmission
c) To authenticate users accessing a network
d) To route data packets between networks
16. Which network device operates at the Data Link layer of the OSI model?
a) Router
b) Switch
c) Bridge

4. d) Hub
17. Which protocol is used for secure communication over the Internet?
a) HTTP
b) FTP
c) HTTPS
d) Telnet
18. What is the purpose of a firewall in a network?
a) To connect multiple networks together
b) To filter incoming and outgoing network traffic
c) To convert domain names into IP addresses
d) To regulate the flow of data packets in a network
19. What is the maximum number of bits in an IPv6 address?
a) 32 bits
b) 64 bits
c) 128 bits
d) 256 bits
20. Which network topology provides the highest level of fault tolerance?
a) Bus
b) Ring
c) Mesh
d) Star
21. What is the purpose of ICMP (Internet Control Message Protocol)?
a) To provide encryption for data transmission
b) To resolve domain names to IP addresses
c) To diagnose network connectivity issues
d) To route data packets between networks

5. 22. Which of the following is a private IP address range?
a) 10.0.0.0 to 10.255.255.255
b) 172.16.0.0 to 172.31.255.255
c) 192.168.0.0 to 192.168.255.255
d) All of the above
23. Which of the following protocols is used for remote terminal access?
a) SSH
b) FTP
c) SNMP
d) ICMP
24. What is the role of DHCP (Dynamic Host Configuration Protocol) in a network?
a) To assign IP addresses to network devices dynamically
b) To translate domain names into IP addresses
c) To route data packets between networks
d) To provide secure communication over the Internet
25. Which of the following is not a component of a TCP header?
a) Source port
b) Destination port
c) Checksum
d) Time-to-live (TTL)