Unit 7

What is the purpose of an IP address?

• To identify a network segment.

• To uniquely identify a device on a network.

• To manage network security.

• To control network bandwidth.

Answer explanation

An IP address serves to uniquely identify a device on a network, allowing for proper communication and data transfer between devices. This is essential for network functionality.

Which network device forwards data packets between different networks?

• Switch

• Hub

• Router

• Modem

Answer explanation

A router is the network device that forwards data packets between different networks, directing traffic and ensuring data reaches its intended destination. In contrast, switches and hubs operate within a single network.

What does DHCP stand for?

• Data Host Configuration Protocol

• Dynamic Host Control Protocol

• Dynamic Host Configuration Protocol

• Digital Host Communication Protocol

Answer explanation

DHCP stands for Dynamic Host Configuration Protocol. It is a network management protocol used to automate the process of configuring devices on IP networks, allowing them to communicate effectively.

Which type of network cable is commonly used in wired Ethernet connections?

• Coaxial cable

• Fiber optic cable

• Twisted-pair cable

• USB cable

Answer explanation

Twisted-pair cable is the most common type used in wired Ethernet connections due to its cost-effectiveness and ability to reduce electromagnetic interference, making it ideal for networking.

What is the purpose of a subnet mask?

• To encrypt network traffic.

• To identify the network portion of an IP address.

• To manage network security.

• To control network bandwidth.

Answer explanation

A subnet mask is used to identify the network portion of an IP address, allowing devices to determine which part of the address refers to the network and which part refers to the host. This is essential for routing traffic within networks.

Which network protocol operates at the Transport layer of the OSI model and provides reliable, connection-oriented communication?

• IP

• UDP

• TCP

• HTTP

Answer explanation

TCP (Transmission Control Protocol) operates at the Transport layer of the OSI model, providing reliable, connection-oriented communication, unlike IP (Internet Protocol) and UDP (User Datagram Protocol), which are either unreliable or connectionless.

What is the function of a network switch?

• To amplify network signals.

• To forward data packets to specific devices within a local network.

• To connect different networks together.

• To convert analog signals to digital signals.

Answer explanation

A network switch's primary function is to forward data packets to specific devices within a local network, ensuring efficient communication between them. This distinguishes it from devices that amplify signals or connect different networks.

Which wireless security protocol is considered the most secure?

• WEP

• WPA

• WPA2/WPA3

• SSID

Answer explanation

WPA2/WPA3 are the most secure wireless security protocols, offering stronger encryption and better protection against attacks compared to WEP and WPA. SSID is not a security protocol but a network name.

What does DNS stand for?

• Digital Network System

• Domain Name Service (Correct)

• Data Network Security

• Dynamic Network Server

Answer explanation

DNS stands for Domain Name Service, which is a system that translates human-friendly domain names into IP addresses, allowing users to access websites easily.

Which IP address range is reserved for private networks?

• 192.168.0.0 to 192.168.255.255

• 10.0.0.0 to 10.255.255.255

• 172.16.0.0 to 172.31.255.255

• All of the above

Answer explanation

The IP address ranges 192.168.0.0 to 192.168.255.255, 10.0.0.0 to 10.255.255.255, and 172.16.0.0 to 172.31.255.255 are all designated for private networks, making 'All of the above' the correct choice.