[Chapter 6 Quiz] Comp 20173 Data Communication And Networking

1. What is the meaning of term ISP?

ISP stands for Internet Service Provider. An ISP is a company or organization that provides access to the internet to individuals or businesses. They offer various internet services such as internet connectivity, email services, web hosting, and more. ISPs connect their customers to the internet through different technologies like DSL, cable, fiber-optic, or wireless connections. They act as a bridge between users and the internet, allowing them to access and browse the World Wide Web.

Explanation

ISP stands for Internet Service Provider. An ISP is a company or organization that provides access to the internet to individuals or businesses. They offer various internet services such as internet connectivity, email services, web hosting, and more. ISPs connect their customers to the internet through different technologies like DSL, cable, fiber-optic, or wireless connections. They act as a bridge between users and the internet, allowing them to access and browse the World Wide Web.

Submit

2. In network communication, it is process of sending a packet from one host to an individual host

Unicast

Multicast

Broadcast

None of these

Unicast refers to the process of sending a packet from one host to an individual host in network communication. This means that the packet is specifically addressed to a single recipient, ensuring that it reaches only that intended host. Unlike multicast, where a packet is sent to a group of hosts, and broadcast, where a packet is sent to all hosts on a network, unicast is a one-to-one communication method.

Explanation

Unicast refers to the process of sending a packet from one host to an individual host in network communication. This means that the packet is specifically addressed to a single recipient, ensuring that it reaches only that intended host. Unlike multicast, where a packet is sent to a group of hosts, and broadcast, where a packet is sent to all hosts on a network, unicast is a one-to-one communication method.

3. A special address used to send data to all hosts in the network

Host Address

Broadcast Address

Network Address

Option 4

A broadcast address is a special address used to send data to all hosts in the network. When a device sends data to the broadcast address, it is received by all devices connected to that network. This is useful for sending information that needs to reach all hosts, such as network announcements or updates. The broadcast address is different from a host address, which is used to identify a specific device, and a network address, which is used to identify the network itself.

Explanation

A broadcast address is a special address used to send data to all hosts in the network. When a device sends data to the broadcast address, it is received by all devices connected to that network. This is useful for sending information that needs to reach all hosts, such as network announcements or updates. The broadcast address is different from a host address, which is used to identify a specific device, and a network address, which is used to identify the network itself.

4. In network communication, it is the process of sending a packet from one host to a selected group of hosts.

Unicast

Multicast

Broadcast

None of these

Multicast is the correct answer because it refers to the process of sending a packet from one host to a selected group of hosts in network communication. Unlike unicast, which sends a packet to a single host, multicast allows for efficient communication to multiple hosts simultaneously. Broadcast, on the other hand, sends a packet to all hosts on the network, while "None of these" is not applicable in this context.

Explanation

Multicast is the correct answer because it refers to the process of sending a packet from one host to a selected group of hosts in network communication. Unlike unicast, which sends a packet to a single host, multicast allows for efficient communication to multiple hosts simultaneously. Broadcast, on the other hand, sends a packet to all hosts on the network, while "None of these" is not applicable in this context.

5. 127.0.0.1 is also called as "this computer".

True

False

The IP address 127.0.0.1 is commonly referred to as "this computer" because it is the loopback address. This address is used to test network connections on the local machine. When a program sends data to this address, it is looped back to the same machine without actually being sent over the network. Therefore, "this computer" is a fitting term for 127.0.0.1.

Explanation

The IP address 127.0.0.1 is commonly referred to as "this computer" because it is the loopback address. This address is used to test network connections on the local machine. When a program sends data to this address, it is looped back to the same machine without actually being sent over the network. Therefore, "this computer" is a fitting term for 127.0.0.1.

6. What subnet mask would be used with the hosts in the 128.107.176.0 /22 network?

255.0.0.0

255.248.0.0

255.255.252.0

255.255.255.0

255.255.255.252

The given IP address is 128.107.176.0 with a subnet mask of /22. This means that the first 22 bits of the IP address represent the network portion, while the remaining bits represent the host portion. To determine the subnet mask, we need to convert the /22 notation to the corresponding subnet mask. The subnet mask 255.255.252.0 has the first 22 bits set to 1, indicating the network portion, and the remaining bits set to 0, indicating the host portion. Therefore, the subnet mask 255.255.252.0 would be used with the hosts in the 128.107.176.0 /22 network.

Explanation

The given IP address is 128.107.176.0 with a subnet mask of /22. This means that the first 22 bits of the IP address represent the network portion, while the remaining bits represent the host portion. To determine the subnet mask, we need to convert the /22 notation to the corresponding subnet mask. The subnet mask 255.255.252.0 has the first 22 bits set to 1, indicating the network portion, and the remaining bits set to 0, indicating the host portion. Therefore, the subnet mask 255.255.252.0 would be used with the hosts in the 128.107.176.0 /22 network.

7. A network administrator is building a network for a small business that has 22 hosts. The ISP has assigned only one Internet routable IP address. Which IP address block can the network administrator use to address the network?

10.11.12.16 /28

172.31.255.128 /27

192.168.1.0 /28

209.165.202.128 /27

The network administrator can use the IP address block 172.31.255.128 /27 to address the network. This block provides a range of IP addresses from 172.31.255.129 to 172.31.255.158, which is sufficient to accommodate the 22 hosts in the small business network. The /27 subnet mask allows for 30 usable host addresses, which is more than enough for the 22 hosts.

Explanation

The network administrator can use the IP address block 172.31.255.128 /27 to address the network. This block provides a range of IP addresses from 172.31.255.129 to 172.31.255.158, which is sufficient to accommodate the 22 hosts in the small business network. The /27 subnet mask allows for 30 usable host addresses, which is more than enough for the 22 hosts.

8. LEGACY IPv4 Addressing: Identify the IPv4 class - 125.45.82.7

Class A

Class B

Class C

Invalid IPv4 Class

The given IPv4 address, 125.45.82.7, falls within the range of Class A addresses. In Class A, the first octet is reserved for the network portion, and the remaining three octets are used for host addresses. The range of Class A addresses is from 1.0.0.0 to 126.255.255.255, and the given address falls within this range. Therefore, it is classified as Class A.

Explanation

The given IPv4 address, 125.45.82.7, falls within the range of Class A addresses. In Class A, the first octet is reserved for the network portion, and the remaining three octets are used for host addresses. The range of Class A addresses is from 1.0.0.0 to 126.255.255.255, and the given address falls within this range. Therefore, it is classified as Class A.

9. The unicast addresses assigned to the end devices in the network.

Network Addresses

Broadcast Addresses

Host Addresses

None of these

The correct answer is "Host Addresses." In a network, unicast addresses are assigned to individual end devices such as computers, smartphones, or printers. These addresses are unique and allow for direct communication between specific devices on the network. Network addresses are used to identify the network itself, while broadcast addresses are used to send data to all devices on the network. Therefore, the unicast addresses assigned to end devices are referred to as host addresses.

Explanation

The correct answer is "Host Addresses." In a network, unicast addresses are assigned to individual end devices such as computers, smartphones, or printers. These addresses are unique and allow for direct communication between specific devices on the network. Network addresses are used to identify the network itself, while broadcast addresses are used to send data to all devices on the network. Therefore, the unicast addresses assigned to end devices are referred to as host addresses.

10. In Computer Network, the loopback is also known as __________ ?

This machine

Localhost

This PC

All of these

The loopback in computer networks refers to a special IP address (127.0.0.1) that is used to test network connectivity on a local machine. It is also known as "localhost" or "this PC". Therefore, all of the given options (this machine, localhost, this PC) are correct terms for referring to the loopback in computer networks.

Explanation

The loopback in computer networks refers to a special IP address (127.0.0.1) that is used to test network connectivity on a local machine. It is also known as "localhost" or "this PC". Therefore, all of the given options (this machine, localhost, this PC) are correct terms for referring to the loopback in computer networks.