Section # 2 (Computer)

Data Communication and Networking

21. What is the difference between a hub and a switch?

A) A hub is faster, a switch is slower
B) A hub broadcasts data to all ports, a switch only sends data to the intended port
C) A hub operates at the Network Layer, a switch operates at the Data Link Layer
D) A hub is more secure, a switch is less secure

A hub broadcasts data to all ports, a switch only sends data to the intended port

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22. Which network topology is the most fault-tolerant?

A) Bus      B) Star      C) Ring      D) Mesh

Mesh

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23. What is the purpose of the Network Layer in the OSI model?

A) Routing      B) Error control and flow control
C) Addressing      D) Encryption

Routing

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24. Which protocol is used for remote access to a network?

A) FTP      B) Telnet      C) SSH      D) HTTP

Telnet (Note: SSH is a more secure alternative to Telnet)

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25. What is the difference between a LAN and a WAN?

A) A LAN is smaller, a WAN is larger
B) A LAN is faster, a WAN is slower
C) A LAN is more secure, a WAN is less secure
D) A LAN is wired, a WAN is wireless

A LAN is smaller, a WAN is larger

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26. Which network device operates at the Physical Layer?

A) Router      B) Switch      C) Hub      D) Repeater

Repeater

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27. Which layer of the OSI model is responsible for providing reliable data transfer?

A) Physical Layer      B) Data Link Layer      C) Transport Layer      D) Session Layer

Transport Layer

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28. What is the purpose of the File Transfer Protocol (FTP)?

A) To transfer files over the internet
B) To send emails over the internet
C) To access remote computers over the internet
D) To manage networks over the internet

To transfer files over the internet

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29. Which network device is used to connect multiple networks together?

A) Switch      B) Router      C) Hub      D) Bridge

Router

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30. What is the difference between a TCP and a UDP connection?

A) TCP is connectionless, UDP is connection-oriented
B) TCP is connection-oriented, UDP is connectionless
C) TCP is faster, UDP is slower
D) TCP is slower, UDP is faster

TCP is connection-oriented, UDP is connectionless

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31. What is the purpose of the Internet Group Management Protocol (IGMP)?

A) To manage multicast groups
B) To manage unicast connections
C) To manage broadcast traffic
D) To manage network congestion

To manage multicast groups

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32. Which network topology is the most scalable?

A) Bus      B) Star      C) Ring      D) Mesh

Mesh

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33. What is the difference between a hub and a switch?

A) A hub is a passive device, a switch is an active device
B) A hub is an active device, a switch is a passive device
C) A hub is faster, a switch is slower
D) A hub is slower, a switch is faster

A hub is a passive device, a switch is an active device

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34. Which protocol is used for network address translation (NAT)

A) NAT-PMP      B) UPnP      C) DHCP      D) ICMP

NAT-PMP

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35. Which protocol is used for secure data transfer over the internet?

A) HTTP      B) FTPS      C) SSH      D) HTTPS

HTTPS

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36. What is the purpose of the Point-to-Point Protocol (PPP)?

A) To provide multipoint connections
B) To provide point-to-point connections
C) To provide security and authentication
D) To provide error reporting and diagnostic functions

To provide point-to-point connections

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37. Which network device is used to connect multiple devices together?

A) Hub      B) Switch      C) Router      D) Bridge

Switch

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38. What is the difference between a subnet mask and a default gateway?

A) A subnet mask defines the network portion of an IP address, a default gateway defines the path to external networks
B) A subnet mask defines the host portion of an IP address, a default gateway defines the path to external networks
C) A subnet mask defines the path to external networks, a default gateway defines the network portion of an IP address
D) A subnet mask defines the host portion of an IP address, a default gateway defines the network portion of an IP address

A subnet mask defines the network portion of an IP address, a default gateway defines the path to external networks

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39. Which protocol is used for voice over internet protocol (VoIP)?

A) SIP      B) H.323      C) MGCP      D) RTP

SIP

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40. What is the purpose of the Address Resolution Protocol (ARP)?

A) To resolve IP addresses to MAC addresses
B) To resolve MAC addresses to IP addresses
C) To provide security and authentication
D) To provide error reporting and diagnostic functions

To resolve IP addresses to MAC addresses

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