Computer Knowledge

Computer Networks

2,614 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

Can VPC Peering be used to connect VPCs across different regions?

  1. Yes

  2. No
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

VPC Peering can only be used to connect VPCs within the same region.

Multiple choice

What is the difference between VPC Peering and NAT Gateway?

  1. VPC Peering is used to connect VPCs within the same region, while NAT Gateway is used to connect VPCs to the internet

  2. VPC Peering is more secure than NAT Gateway

  3. VPC Peering is easier to configure than NAT Gateway

  4. VPC Peering is less expensive than NAT Gateway
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The main difference between VPC Peering and NAT Gateway is that VPC Peering is used to connect VPCs within the same region, while NAT Gateway is used to connect VPCs to the internet.

Multiple choice

Which protocol is used to provide authentication and authorization for GPRS users?

  1. PPP

  2. EAP

  3. RADIUS

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

EAP (Extensible Authentication Protocol) is used to provide authentication and authorization for GPRS users. EAP allows for a variety of authentication methods, including password-based authentication, token-based authentication, and certificate-based authentication.

Multiple choice

Which protocol is used to provide encryption for GPRS data traffic?

  1. IPsec

  2. SSL

  3. TLS

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

IPsec (IP Security) is used to provide encryption for GPRS data traffic. IPsec is a suite of protocols that can be used to secure IP traffic, including traffic between GPRS users and the Internet.

Multiple choice

Which protocol is used to provide a connection-oriented data service for GPRS users?

  1. PPP

  2. X.25

  3. Frame Relay

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

PPP (Point-to-Point Protocol) is used to provide a connection-oriented data service for GPRS users. PPP is a simple protocol that can be used to establish a connection between two devices over a serial link.

Multiple choice

Which protocol is used to provide a physical layer connection between a GPRS user and the network?

  1. RLC

  2. MAC

  3. PHY

  4. RRC
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

PHY (Physical Layer) is used to provide a physical layer connection between a GPRS user and the network. PHY is a complex protocol that is responsible for a variety of tasks, including modulation, demodulation, and error correction.

Multiple choice

Which protocol is used to provide authentication and authorization for GPRS users?

  1. PPP

  2. EAP

  3. RADIUS

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

EAP (Extensible Authentication Protocol) is used to provide authentication and authorization for GPRS users. EAP allows for a variety of authentication methods, including password-based authentication, token-based authentication, and certificate-based authentication.

Multiple choice

Which protocol is used to provide encryption for GPRS data traffic?

  1. IPsec

  2. SSL

  3. TLS

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

IPsec (IP Security) is used to provide encryption for GPRS data traffic. IPsec is a suite of protocols that can be used to secure IP traffic, including traffic between GPRS users and the Internet.

Multiple choice

Which technology enables the creation of a secure overlay network over a public network?

  1. Virtual Private Network (VPN)

  2. Software-Defined Perimeter (SDP)

  3. Zero Trust Network Access (ZTNA)

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

VPNs, SDPs, and ZTNAs all allow for the creation of secure overlay networks over public networks.

Multiple choice

Which of the following is a key feature of the IEC 60870-5-104 standard?

  1. It uses a master-slave architecture

  2. It supports both synchronous and asynchronous communication

  3. It is a secure protocol

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All of the above are key features of the IEC 60870-5-104 standard.

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 IP address range for a public subnet in a VPC?

  1. 10.0.0.0/24

  2. 172.16.0.0/24

  3. 192.168.0.0/24

  4. 203.0.113.0/24
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Public subnets must be assigned a public IP address range, which is typically provided by the cloud provider. The given IP address range (203.0.113.0/24) is a valid public IP address range.

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.