Computer Knowledge

Computer Networks

2,095 Questions

Computer networks form the backbone of digital communication, connecting multiple devices to share data and resources. This area covers network architectures, transmission media, modems, and topologies like LAN. These concepts are crucial for computer knowledge sections in banking and government exams.

Network topologiesModulation and demodulationNetwork addressingFiber optic cablesWireless infrastructure

Computer Networks Questions

Multiple choice networking

Which cable supports a speed of 100 Mbps?

  1. Category 1

  2. Category 2

  3. Category 3

  4. Category 4

  5. Category 5
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Category 5 (Cat5) cabling is rated for speeds up to 100 Mbps and is the standard for 100Base-TX Fast Ethernet. Category 3 is limited to 10 Mbps, and Category 4 is limited to 16 Mbps. Categories 1 and 2 are not suitable for high-speed data networks.

Multiple choice networking

Which network device is the best at connecting dissimilar systems?

  1. Router

  2. Gateway

  3. NIC

  4. Bridge

  5. Firewall
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A gateway operates at the application layer and can translate between different protocols and architectures, making it ideal for connecting dissimilar systems. Routers operate at Layer 3 and can only connect networks using the same protocol. Bridges connect segments at Layer 2, while NICs are individual network interface cards and not interconnection devices.

Multiple choice networking

How many stations can a fiber optic network support?

  1. 25,000

  2. 10,000

  3. 5,000

  4. 1,000

  5. 500
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This question appears to reference FDDI (Fiber Distributed Data Interface) networks, which can support up to 1,000 stations. FDDI is a token-passing network technology that uses fiber optic cables and was designed for high-performance campus backbones. The 1,000-station limit comes from the token rotation time requirements in the FDDI standard.

Multiple choice networking

Where do the MAC sublayers fit into the OSI model?

  1. Transport

  2. Network

  3. Data Link

  4. Presentation

  5. Physical
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The MAC (Media Access Control) sublayer is the lower half of the Data Link Layer (Layer 2) in the OSI model. It handles physical addressing and media access control. The Data Link Layer consists of two sublayers: MAC (lower) and LLC (Logical Link Control, upper). The Transport and Network layers are above it.

Multiple choice networking

In older Network Interface Cards, what is the configuration of the switches?

  1. Single Inline pin

  2. Dual Inline pin

  3. Switch integrated pin

  4. Dual integrated pin

  5. Single inline memory module
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Older NICs often used DIP (Dual Inline Pin) switches for manual configuration of IRQ and I/O addresses before the advent of Plug and Play (PnP) technology. SIMM (Option 3995) refers to memory modules, not configuration switches.

Multiple choice networking

What type of device is a VPN adapter?

  1. Integrated

  2. Virtual

  3. Physical

  4. Logical

  5. Virtual Packet Node
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To answer this question, the user needs to know what a VPN adapter is and the different types of devices that exist for VPN.

A VPN adapter is a network interface card (NIC) that connects a computer or device to a virtual private network (VPN). It enables the user to securely access a private network over the internet.

Now, let's go through each option and explain why it is right or wrong:

A. Integrated: This option is incorrect because an integrated device refers to a device that is built into another device. A VPN adapter is a separate device that is added to a computer or device to enable VPN access.

B. Virtual: This option is partially correct. A VPN adapter is a virtual device that creates a secure connection between the user's computer and the VPN server. It works by encrypting the user's internet traffic and routing it through the VPN server.

C. Physical: This option is incorrect because a physical device refers to a tangible hardware device. A VPN adapter is not a physical device but a virtual one.

D. Logical: This option is partially correct. A VPN adapter is a logical device that is created by software to enable VPN access. It works by creating a secure tunnel through which the user's internet traffic is routed.

E. Virtual Packet Node: This option is incorrect because a virtual packet node is not a type of device used for VPN. It is a type of virtual machine that is used to emulate network traffic for testing purposes.

Therefore, the correct answer is:

The Answer is: B

Multiple choice networking

The maximum number of nodes per segment depends on the_______.?

  1. Bandwidth

  2. Desired throughput

  3. Regeneration ability

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

To determine the maximum number of nodes per segment, we need to consider the factor that influences this limit. Let's analyze each option to understand its relevance:

Option A) Bandwidth - This option is correct. The maximum number of nodes that can be accommodated on a network segment depends on the available bandwidth. Insufficient bandwidth can lead to congestion and decreased performance, limiting the number of nodes that can be supported.

Option B) Desired throughput - This option is not directly related to the maximum number of nodes per segment. Desired throughput refers to the amount of data that a user or application wants to transfer within a given time frame but does not dictate the node capacity of a segment.

Option C) Regeneration ability - This option does not directly influence the maximum number of nodes per segment. Regeneration ability typically refers to the capability of network devices to restore signal quality, which is not directly linked to the number of nodes on a segment.

Option D) Attenuation - While attenuation can impact signal strength and quality over a network segment, it is not the primary determinant of the maximum number of nodes per segment.

Therefore, the correct answer is:

The maximum number of nodes per segment depends on the Bandwidth (Option A).

Bandwidth availability directly affects the number of nodes that can be supported on a network segment.

Multiple choice networking

IEEE designates Thicknet as_______Ethernet.

  1. 10Base5

  2. 10BaseT

  3. 10Base10

  4. 10Base2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

To answer this question, the user needs to be familiar with the IEEE Ethernet designations and the different types of Ethernet cables.

Thicknet is a type of Ethernet cable that has a thicker diameter than other Ethernet cables. It is also known as 10Base5 because it can support Ethernet networks with a maximum data transfer rate of 10 Mbps over a maximum distance of 500 meters.

Now, let's go through each option and determine which one is the correct answer:

A. 10Base5: This option is correct. Thicknet is also known as 10Base5 according to IEEE Ethernet designations.

B. 10BaseT: This option is incorrect. 10BaseT is a type of Ethernet cable that uses twisted-pair wiring and can support Ethernet networks with a maximum data transfer rate of 10 Mbps over a maximum distance of 100 meters.

C. 10Base10: This option is incorrect. 10Base10 is not a valid Ethernet designation.

D. 10Base2: This option is incorrect. 10Base2 is a type of Ethernet cable that uses thin coaxial wiring and can support Ethernet networks with a maximum data transfer rate of 10 Mbps over a maximum distance of 185 meters.

Therefore, the correct answer is:

The Answer is: A. 10Base5

Multiple choice networking

Which cannot support full-duplexing?

  1. 100BaseT4

  2. 10BaseT

  3. 100BaseTX
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

100BaseT4 uses four pairs of Category 3 (or better) cabling. Because it requires three pairs to transmit or receive data simultaneously in one direction, it cannot support full-duplex operation. 10BaseT and 100BaseTX only require two pairs and can operate in full-duplex mode.

Multiple choice networking

WAN requires the same technology as LAN.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To solve this question, the user needs to know the difference between WAN and LAN technologies.

A Local Area Network (LAN) is a network that is confined to a small geographic area, such as a single building or a campus. LANs are typically used for connecting computers, printers, and other devices together in an office or home environment. LANs typically use Ethernet or Wi-Fi technology to connect devices together.

A Wide Area Network (WAN), on the other hand, covers a much larger geographic area, such as a city, region, or even a country. WANs are used to connect LANs together over longer distances, and they typically use technologies such as leased lines, satellite links, or microwave links.

Now, let's go through each option and explain why it is right or wrong:

A. True: This option is incorrect. While LAN and WAN are both types of computer networks, they require different technologies to operate. For example, LANs often use Ethernet or Wi-Fi technology, while WANs may use leased lines, satellite links, or microwave links. In addition, WANs often require specialized hardware and software to ensure that data is transmitted quickly and securely over long distances.

B. False: This option is correct. LAN and WAN are both types of computer networks, but they require different technologies to operate. LANs are typically confined to a small geographic area and use Ethernet or Wi-Fi technology, while WANs cover a much larger area and use technologies such as leased lines, satellite links, or microwave links.

The Answer is: B. False

Multiple choice networking

On modern networks, the transceiver are separate from the NICs.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

On modern networks using twisted-pair copper (like 10BaseT, 100BaseT), the transceiver functionality is integrated directly into the Network Interface Card (NIC). The transceiver is only separate on older networks using thick or thin coaxial cables where external transceivers connected via AUI ports.

Multiple choice networking

You can mix 100BaseTX and 1000BaseT4 on a single network segment.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To determine whether it is possible to mix 100BaseTX and 1000BaseT4 on a single network segment, we need to understand the compatibility between these two technologies.

100BaseTX and 1000BaseT4 are Ethernet standards that specify the maximum data transfer rate and the type of cabling used.

100BaseTX operates at a maximum speed of 100 Mbps (Megabits per second) and uses twisted pair copper cables. It uses two pairs of wires for transmitting and receiving data.

1000BaseT4, on the other hand, operates at a maximum speed of 1000 Mbps (1 Gbps) and also uses twisted pair copper cables. However, it uses all four pairs of wires for transmitting and receiving data.

Based on this information, it is not possible to mix 100BaseTX and 1000BaseT4 on a single network segment. The two standards have different data transfer rates and use different wire configurations. Mixing them on the same segment would result in compatibility issues and unreliable network performance.

Therefore, the correct answer is:

B. False

Multiple choice networking

Which device act as a traffic cop?

  1. Router

  2. Hub

  3. Switch

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

To solve this question, the user needs to have a basic understanding of computer networking and the functions of different networking devices.

Now, let's go through each option and explain why it is right or wrong:

A. Router: This option is correct. A router acts as a traffic cop in a network. It receives data packets from different devices and determines the best path for each packet to reach its destination. It makes decisions based on network protocols and routing tables.

B. Hub: This option is incorrect. A hub is a basic networking device that simply broadcasts incoming data packets to all connected devices. It does not make any intelligent decisions or act as a traffic cop.

C. Switch: This option is incorrect. A switch is a networking device that connects multiple devices within a local area network (LAN). It forwards data packets to the intended recipient based on the MAC address. While a switch can handle and manage network traffic, it does not perform the same level of intelligent routing as a router.

D. Modem: This option is incorrect. A modem is a device that connects a computer or network to the internet through a telecommunications line. It does not act as a traffic cop within a network.

Therefore, the correct answer is:

The Answer is: A. Router

Multiple choice networking

Collision occurs when two devices on the same network segment attempt to simultaneously transmit.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Collision in networking occurs when two or more devices on the same network segment attempt to transmit data simultaneously, causing the signals to interfere with each other. This is a fundamental concept in Ethernet networks and was particularly relevant in shared-medium networks like early Ethernet using CSMA/CD.