Computer Knowledge

Computer Networks

2,461 Questions

Computer networks involve the architecture, protocols, and security measures used for digital communication. This collection covers OSI model layers, IP addressing, data transmission, and cryptographic standards. These concepts are vital for the computer knowledge sections of banking and government exams.

OSI model layersNetwork protocolsIP subnet maskingData encryption standardsServer configurationsNetwork commands

Computer Networks Questions

Multiple choice

What is the default VPC routing table called?

  1. Main Routing Table

  2. Default Routing Table

  3. Global Routing Table

  4. Public Routing Table
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The default VPC routing table is automatically created and named as 'Default Routing Table'.

Multiple choice

Which of the following is a valid subnet mask for a subnet with a CIDR block of 10.0.0.0/24?

  1. 255.255.255.0

  2. 255.255.255.128

  3. 255.255.255.192

  4. 255.255.255.224
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

For a CIDR block of 10.0.0.0/24, the subnet mask should be 255.255.255.0, which represents a network prefix of 24 bits.

Multiple choice

What is a Network Address Translation (NAT) gateway in a VPC?

  1. A gateway that allows instances in a private subnet to access the internet

  2. A gateway that allows instances in a public subnet to access a private subnet

  3. A gateway that allows instances in a VPC to communicate with each other

  4. A gateway that allows instances in a VPC to communicate with on-premises networks
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A NAT gateway enables instances in a private subnet to access the internet by translating their private IP addresses to public IP addresses.

Multiple choice

Which of the following is a valid CIDR block for a VPC?

  1. 10.0.0.0/24

  2. 172.16.0.0/24

  3. 192.168.0.0/24

  4. 224.0.0.0/24
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Valid CIDR blocks for VPCs are typically within the private IP address ranges, such as 10.0.0.0/24, 172.16.0.0/24, and 192.168.0.0/24.

Multiple choice

Which protocol is used for user data transmission in LTE networks?

  1. TCP

  2. UDP

  3. SCTP

  4. PDCP
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

PDCP (Packet Data Convergence Protocol) is used for user data transmission in LTE networks.

Multiple choice

Which protocol is used for signaling and control in LTE networks?

  1. GTP

  2. SCTP

  3. HTTP

  4. ICMP
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

GTP (GPRS Tunneling Protocol) is used for signaling and control in LTE networks.

Multiple choice

Which protocol is used for session management in LTE networks?

  1. SIP

  2. SDP

  3. RTP

  4. RTCP
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

SIP (Session Initiation Protocol) is used for session management in LTE networks.

Multiple choice

Which protocol is used for inter-eNB communication in LTE networks?

  1. X2

  2. S1

  3. GTP

  4. SCTP
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

X2 is used for inter-eNB communication in LTE networks.

Multiple choice

Which of the following is a security protocol used in HSPA networks to protect signaling traffic?

  1. IPsec

  2. TLS

  3. EAP-AKA

  4. IKEv2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

IKEv2 (Internet Key Exchange version 2) is the security protocol used in HSPA networks to protect signaling traffic, establishing secure key exchanges and authenticating network entities.

Multiple choice

What is the difference between a route table and a network interface card (NIC) in cloud networking?

  1. A route table contains a list of routes that determine how traffic is forwarded within a VNet, while a NIC is a virtual network adapter that connects a virtual machine to a VNet

  2. A route table contains a list of routes that determine how traffic is forwarded between VNet's, while a NIC is a virtual network adapter that connects a virtual machine to a VNet

  3. A route table contains a list of routes that determine how traffic is forwarded between VNet's, while a NIC is a virtual network adapter that connects a virtual machine to the internet

  4. A route table contains a list of routes that determine how traffic is forwarded within a VNet, while a NIC is a virtual network adapter that connects a virtual machine to the internet
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A route table contains a list of routes that determine how traffic is forwarded within a VNet. This allows you to control how traffic is routed between different subnets and resources within the VNet. A network interface card (NIC) is a virtual network adapter that connects a virtual machine to a VNet. It allows the virtual machine to communicate with other resources within the VNet and with resources on the internet.

Multiple choice

What is the difference between a private DNS zone and a public DNS zone in cloud networking?

  1. A private DNS zone is used to resolve DNS queries within a VNet, while a public DNS zone is used to resolve DNS queries from the internet

  2. A private DNS zone is used to resolve DNS queries from the internet, while a public DNS zone is used to resolve DNS queries within a VNet

  3. A private DNS zone is used to connect multiple VNet's together, while a public DNS zone is used to resolve DNS queries from the internet

  4. A private DNS zone is used to resolve DNS queries within a VNet, while a public DNS zone is used to connect multiple VNet's together
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A private DNS zone is used to resolve DNS queries within a VNet. This allows resources within the VNet to communicate with each other using domain names, rather than IP addresses. A public DNS zone is used to resolve DNS queries from the internet. This allows resources on the internet to access resources in your VNet using domain names, rather than IP addresses.

Multiple choice

What is the primary purpose of Network Address Translation (NAT)?

  1. To conserve IPv4 addresses

  2. To improve network performance

  3. To enhance network security

  4. To simplify network management
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

NAT is primarily used to conserve IPv4 addresses by allowing multiple devices to share a single public IP address.

Multiple choice

In a NAT environment, what is the device that performs the address translation called?

  1. NAT gateway

  2. NAT router

  3. NAT firewall

  4. NAT switch
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a NAT environment, the device that performs the address translation is typically a NAT router.

Multiple choice

What are the two main types of NAT?

  1. Static NAT and Dynamic NAT

  2. Public NAT and Private NAT

  3. Internal NAT and External NAT

  4. Source NAT and Destination NAT
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The two main types of NAT are Static NAT and Dynamic NAT.

Multiple choice

Which type of NAT assigns a fixed public IP address to a specific private IP address?

  1. Static NAT

  2. Dynamic NAT

  3. PAT

  4. NAPT
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Static NAT assigns a fixed public IP address to a specific private IP address.