101. How many bits are used for a cyclic redundancy check (CRC) in a network?
1 bit
2 bits
Depends on the number of bits in the data being transmitted
4 bits
Show me the answer
Answer: 3. Depends on the number of bits in the data being transmitted
Explanation:
The number of bits used for CRC depends on the size of the data being transmitted.
102. How many bits are used for forward error correction (FEC) in a network?
1 bit
2 bits
Depends on the number of bits in the data being transmitted
4 bits
Show me the answer
Answer: 3. Depends on the number of bits in the data being transmitted
Explanation:
The number of bits used for FEC depends on the size of the data being transmitted.
103. What is the main function of ARP in a network?
To map IP addresses to physical addresses (MAC addresses)
To provide fast transmission of data
To provide secure transmission of data
To provide efficient transmission of data
Show me the answer
Answer: 1. To map IP addresses to physical addresses (MAC addresses)
Explanation:
ARP maps IP addresses to MAC addresses to enable communication between devices on a network.
104. What type of addresses does ARP resolve in a network?
IP addresses
MAC addresses
Both IP and MAC addresses
None of these
Show me the answer
Answer: 3. Both IP and MAC addresses
Explanation:
ARP resolves both IP and MAC addresses.
105. What is the main use of ARP in a network?
To allow communication between different devices on a network
To provide fast transmission of data
To provide secure transmission of data
To provide efficient transmission of data
Show me the answer
Answer: 1. To allow communication between different devices on a network
Explanation:
ARP enables communication between devices by mapping IP addresses to MAC addresses.
106. How does ARP work in a network?
By maintaining a cache (or table) of mappings between IP addresses and MAC addresses
By providing fast transmission of data
By providing secure transmission of data
By providing efficient transmission of data
Show me the answer
Answer: 1. By maintaining a cache (or table) of mappings between IP addresses and MAC addresses
Explanation:
ARP maintains a cache of IP-to-MAC address mappings to facilitate communication.
107. What happens if the ARP cache does not have an entry for a particular IP address in a network?
ARP sends a broadcast message to all devices on the network to resolve the mapping
ARP provides fast transmission of data
ARP provides secure transmission of data
ARP provides efficient transmission of data
Show me the answer
Answer: 1. ARP sends a broadcast message to all devices on the network to resolve the mapping
Explanation:
If the ARP cache does not have an entry, ARP sends a broadcast message to resolve the IP-to-MAC mapping.
108. How often does the ARP cache get updated in a network?
Whenever a new mapping is added or an existing mapping is changed
Every hour
Every day
Every week
Show me the answer
Answer: 1. Whenever a new mapping is added or an existing mapping is changed
Explanation:
The ARP cache is updated dynamically whenever a new mapping is added or an existing mapping changes.
109. What is the main function of the Network layer in a computer network?
To provide addressing and routing of data between devices
To provide fast transmission of data
To provide secure transmission of data
To provide efficient transmission of data
Show me the answer
Answer: 1. To provide addressing and routing of data between devices
Explanation:
The Network layer provides addressing and routing of data between devices.
110. What is an Internet address in the context of the Network layer?
A unique identifier for a device on the Internet
A fast transmission of data
A secure transmission of data
An efficient transmission of data
Show me the answer
Answer: 1. A unique identifier for a device on the Internet
Explanation:
An Internet address (IP address) uniquely identifies a device on the Internet.
111. What is a classful address in the context of the Network layer?
An addressing scheme where the address is divided into classes based on the size of the network
A fast transmission of data
A secure transmission of data
An efficient transmission of data
Show me the answer
Answer: 1. An addressing scheme where the address is divided into classes based on the size of the network
Explanation:
Classful addressing divides IP addresses into classes (A, B, C, etc.) based on the size of the network.
112. What is the main function of subnetting in the Network layer?
To divide a large network into smaller sub-networks
To provide fast transmission of data
To provide secure transmission of data
To provide efficient transmission of data
Show me the answer
Answer: 1. To divide a large network into smaller sub-networks
Explanation:
Subnetting divides a large network into smaller sub-networks for better management and efficiency.
113. What is an example of a routing protocol in the Network layer?
RIP
OSPF
BGP
All of the above
Show me the answer
Answer: 4. All of the above
Explanation:
RIP, OSPF, and BGP are examples of routing protocols used in the Network layer.
114. What is the difference between unicast and multicast routing protocols in the Network layer?
Unicast is used for one-to-one communication while multicast is used for one-to-many communication
Unicast is used for fast transmission of data while multicast is used for secure transmission of data
Unicast is used for efficient transmission of data while multicast is used for reliable transmission of data
None of these
Show me the answer
Answer: 1. Unicast is used for one-to-one communication while multicast is used for one-to-many communication
Explanation:
Unicast is for one-to-one communication, while multicast is for one-to-many communication.
115. What is an example of a routing algorithm in the Network layer?
Shortest path algorithm
Flooding
Distance vector routing
All of the above
Show me the answer
Answer: 4. All of the above
Explanation:
Shortest path, flooding, and distance vector routing are examples of routing algorithms.
116. What is the main function of ARP in the Network layer?
To map IP addresses to physical addresses (MAC addresses)
To provide fast transmission of data
To provide secure transmission of data
To provide efficient transmission of data
Show me the answer
Answer: 1. To map IP addresses to physical addresses (MAC addresses)
Explanation:
ARP maps IP addresses to MAC addresses to enable communication between devices.
117. What is the main function of RARP in the Network layer?
To map physical addresses (MAC addresses) to IP addresses
To provide fast transmission of data
To provide secure transmission of data
To provide efficient transmission of data
Show me the answer
Answer: 1. To map physical addresses (MAC addresses) to IP addresses
Explanation:
RARP maps MAC addresses to IP addresses.
118. What is the main function of IP in the Network layer?
To provide addressing and routing of data between devices
To provide fast transmission of data
To provide secure transmission of data
To provide efficient transmission of data
Show me the answer
Answer: 1. To provide addressing and routing of data between devices
Explanation:
IP provides addressing and routing of data between devices.
119. What is the main function of ICMP in the Network layer?
To provide error reporting and control messages in IP networks
To provide fast transmission of data
To provide secure transmission of data
To provide efficient transmission of data
Show me the answer
Answer: 1. To provide error reporting and control messages in IP networks
Explanation:
ICMP provides error reporting and control messages in IP networks.
120. What is IPv6 in the context of the Network layer?
The latest version of the Internet Protocol that replaces IPv4
A fast transmission of data
A secure transmission of data
An efficient transmission of data
Show me the answer
Answer: 1. The latest version of the Internet Protocol that replaces IPv4
Explanation:
IPv6 is the latest version of the Internet Protocol, designed to replace IPv4.
121. What is the main difference between the packet format in IPv4 and IPv6?
IPv6 uses a larger packet size compared to IPv4
IPv6 uses a smaller packet size compared to IPv4
IPv6 uses the same packet size as IPv4
None of these
Show me the answer
Answer: 1. IPv6 uses a larger packet size compared to IPv4
Explanation:
IPv6 uses a larger packet size (128 bits) compared to IPv4 (32 bits).
122. What are extension headers in IPv6?
Additional headers that can be used to carry optional information in IPv6 packets
A fast transmission of data
A secure transmission of data
An efficient transmission of data
Show me the answer
Answer: 1. Additional headers that can be used to carry optional information in IPv6 packets
Explanation:
Extension headers in IPv6 carry optional information for additional functionality.
123. What is the main purpose of the transition from IPv4 to IPv6?
To address the depletion of IPv4 addresses and provide more addresses for the growing Internet
To provide fast transmission of data
To provide secure transmission of data
To provide efficient transmission of data
Show me the answer
Answer: 1. To address the depletion of IPv4 addresses and provide more addresses for the growing Internet
Explanation:
The transition to IPv6 addresses the depletion of IPv4 addresses and provides a larger address space.
124. What is multicasting in the context of the Network layer?
The delivery of a single message to multiple recipients simultaneously
The delivery of multiple messages to a single recipient simultaneously
The delivery of a single message to a single recipient simultaneously
None of these
Show me the answer
Answer: 1. The delivery of a single message to multiple recipients simultaneously
Explanation:
Multicasting delivers a single message to multiple recipients simultaneously.
125. What is the main advantage of multicasting in the Network layer?
It reduces the amount of network traffic and improves scalability
It provides fast transmission of data
It provides secure transmission of data
It provides efficient transmission of data
Show me the answer
Answer: 1. It reduces the amount of network traffic and improves scalability
Explanation:
Multicasting reduces network traffic by sending a single message to multiple recipients.
126. How does multicasting in the Network layer work?
By using a multicast address to identify the recipients of the message
By using a broadcast address to identify the recipients of the message
By using a unicast address to identify the recipients of the message
None of these
Show me the answer
Answer: 1. By using a multicast address to identify the recipients of the message
Explanation:
Multicasting uses a multicast address to identify the recipients of the message.
127. What is the main difference between unicast and multicast in the Network layer?
Unicast is used for one-to-one communication while multicast is used for one-to-many communication
Unicast is used for fast transmission of data while multicast is used for secure transmission of data
Unicast is used for efficient transmission of data while multicast is used for reliable transmission of data
None of these
Show me the answer
Answer: 1. Unicast is used for one-to-one communication while multicast is used for one-to-many communication
Explanation:
Unicast is for one-to-one communication, while multicast is for one-to-many communication.
128. What is the main advantage of using multicast over unicast in the Network layer?
It reduces the amount of network traffic and improves scalability
It provides faster transmission of data compared to unicast
It provides more secure transmission of data compared to unicast
It provides more efficient transmission of data compared to unicast
Show me the answer
Answer: 1. It reduces the amount of network traffic and improves scalability
Explanation:
Multicasting reduces network traffic by sending a single message to multiple recipients.
129. What is an IP address in a computer network?
A unique identifier for a device on a network
A fast transmission of data
A secure transmission of data
An efficient transmission of data
Show me the answer
Answer: 1. A unique identifier for a device on a network
Explanation:
An IP address uniquely identifies a device on a network.
130. What are the two main types of IP addresses?
IPv4 and IPv6
MAC and IP
Physical and logical
None of these
Show me the answer
Answer: 1. IPv4 and IPv6
Explanation:
The two main types of IP addresses are IPv4 and IPv6.
131. What is the main difference between IPv4 and IPv6 addresses?
IPv6 addresses are longer and provide more address space compared to IPv4 addresses
IPv4 addresses are faster compared to IPv6 addresses
IPv4 addresses are more secure compared to IPv6 addresses
IPv4 addresses are more efficient compared to IPv6 addresses
Show me the answer
Answer: 1. IPv6 addresses are longer and provide more address space compared to IPv4 addresses
Explanation:
IPv6 addresses are 128 bits long, providing a larger address space compared to IPv4 (32 bits).
132. What is the maximum number of IP addresses that can be assigned using IPv4?
4.3 billion
4.3 million
4.3 trillion
4.3 quadrillion
Show me the answer
Answer: 1. 4.3 billion
Explanation:
IPv4 supports approximately 4.3 billion unique addresses.
133. What is the main purpose of subnetting in IP addressing?
To divide a large network into smaller sub-networks
To provide fast transmission of data
To provide secure transmission of data
To provide efficient transmission of data
Show me the answer
Answer: 1. To divide a large network into smaller sub-networks
Explanation:
Subnetting divides a large network into smaller sub-networks for better management and efficiency.
134. What is a broadcast address in IP addressing?
An address used to send a message to all devices on a network
An address used for fast transmission of data
An address used for secure transmission of data
An address used for efficient transmission of data
Show me the answer
Answer: 1. An address used to send a message to all devices on a network
Explanation:
A broadcast address sends a message to all devices on a network.
135. What is a private IP address in IP addressing?
An IP address that can only be used within a private network and not on the Internet
An IP address that can be used on the Internet and private networks
An IP address used for fast transmission of data
An IP address used for secure transmission of data
Show me the answer
Answer: 1. An IP address that can only be used within a private network and not on the Internet
Explanation:
Private IP addresses are used within private networks and are not routable on the Internet.
136. What is a public IP address in IP addressing?
An IP address that can be used on the Internet and private networks
An IP address that can only be used within a private network and not on the Internet
An IP address used for fast transmission of data
An IP address used for secure transmission of data
Show me the answer
Answer: 1. An IP address that can be used on the Internet and private networks
Explanation:
Public IP addresses are routable on the Internet and can be used globally.
137. What is DHCP in IP addressing?
A protocol used to dynamically assign IP addresses to devices on a network
A fast transmission of data
A secure transmission of data
An efficient transmission of data
Show me the answer
Answer: 1. A protocol used to dynamically assign IP addresses to devices on a network
Explanation:
DHCP dynamically assigns IP addresses to devices on a network.
138. What is IPv4 in the context of computer networking?
The fourth version of the Internet Protocol that provides addressing and routing of data between devices
A fast transmission of data
A secure transmission of data
An efficient transmission of data
Show me the answer
Answer: 1. The fourth version of the Internet Protocol that provides addressing and routing of data between devices
Explanation:
IPv4 is the fourth version of the Internet Protocol, widely used for addressing and routing.
139. What is the maximum number of IP addresses that can be assigned using IPv4?
4.3 billion
4.3 million
4.3 trillion
4.3 quadrillion
Show me the answer
Answer: 1. 4.3 billion
Explanation:
IPv4 supports approximately 4.3 billion unique addresses.
140. What is the format of an IPv4 address?
A 32-bit address represented in dotted decimal notation
A 64-bit address represented in dotted decimal notation
A 128-bit address represented in dotted decimal notation
None of these
Show me the answer
Answer: 1. A 32-bit address represented in dotted decimal notation
Explanation:
IPv4 addresses are 32-bit addresses represented in dotted decimal notation (e.g., 192.168.1.1).
141. What is a subnet mask in IPv4?
A 32-bit value used to define the portion of an IP address that represents the network address and the portion that represents the host address
A fast transmission of data
A secure transmission of data
An efficient transmission of data
Show me the answer
Answer: 1. A 32-bit value used to define the portion of an IP address that represents the network address and the portion that represents the host address
Explanation:
A subnet mask defines the network and host portions of an IP address.
142. What is the main purpose of subnetting in IPv4?
To divide a large network into smaller sub-networks
To provide fast transmission of data
To provide secure transmission of data
To provide efficient transmission of data
Show me the answer
Answer: 1. To divide a large network into smaller sub-networks
Explanation:
Subnetting divides a large network into smaller sub-networks for better management and efficiency.
143. What is a broadcast address in IPv4?
An address used to send a message to all devices on a network
An address used for fast transmission of data
An address used for secure transmission of data
An address used for efficient transmission of data
Show me the answer
Answer: 1. An address used to send a message to all devices on a network
Explanation:
A broadcast address sends a message to all devices on a network.
144. What is a private IP address in IPv4?
An IP address that can only be used within a private network and not on the Internet
An IP address that can be used on the Internet and private networks
An IP address used for fast transmission of data
An IP address used for secure transmission of data
Show me the answer
Answer: 1. An IP address that can only be used within a private network and not on the Internet
Explanation:
Private IP addresses are used within private networks and are not routable on the Internet.
145. What is a public IP address in IPv4?
An IP address that can be used on the Internet and private networks
An IP address that can only be used within a private network and not on the Internet
An IP address used for fast transmission of data
An IP address used for secure transmission of data
Show me the answer
Answer: 1. An IP address that can be used on the Internet and private networks
Explanation:
Public IP addresses are routable on the Internet and can be used globally.
146. What is a Class A IPv4 address?
An IP address that has a large address space and is used for large networks
An IP address that has a small address space and is used for small networks
An IP address that provides fast transmission of data
An IP address that provides secure transmission of data
Show me the answer
Answer: 1. An IP address that has a large address space and is used for large networks
Explanation:
Class A addresses have a large address space and are used for large networks.
147. What is the format of a Class A IP address?
The first octet of the IP address is used to identify the network and the remaining three octets are used to identify the host
The first two octets of the IP address are used to identify the network and the remaining two octets are used to identify the host
The first three octets of the IP address are used to identify the network and the remaining octet is used to identify the host
None of these
Show me the answer
Answer: 1. The first octet of the IP address is used to identify the network and the remaining three octets are used to identify the host
Explanation:
In Class A addresses, the first octet identifies the network, and the remaining three octets identify the host.
148. What is the range of the first octet in a Class A IP address?
0 to 127
128 to 191
192 to 223
224 to 255
Show me the answer
Answer: 1. 0 to 127
Explanation:
The first octet of a Class A address ranges from 0 to 127.
149. How many networks can be created using a Class A IP address?
126
16,384
2,097,152
None of these
Show me the answer
Answer: 1. 126
Explanation:
Class A addresses support 126 networks.
150. How many hosts can be assigned to a network using a Class A IP address?
16,777,214
65,534
254
None of these
Show me the answer
Answer: 1. 16,777,214
Explanation:
Class A addresses support up to 16,777,214 hosts per network.
