Computer Networks LST

What is a network?

• A single computer used for personal tasks

• Two or more computers or devices connected for communication

• A device that stores data

• A type of software for managing files

Answer explanation

A network is defined as two or more computers or devices connected for communication. This allows them to share resources and information, distinguishing it from a single computer or storage device.

What is one advantage of using a network?

• Increased electricity usage

• File sharing between users

• More complex setup

• Limited communication options

Answer explanation

One advantage of using a network is file sharing between users, which allows for easy access and collaboration on documents and resources, enhancing productivity and communication.

Which of the following is an example of hardware sharing on a network?

• Sharing a document via email

• Using a shared printer

• Video chatting with a friend

• Accessing a website

Answer explanation

Using a shared printer is an example of hardware sharing on a network, as it allows multiple users to access and utilize the same physical printer, unlike the other options which involve sharing information or communication.

What does roaming access allow users to do on a network?

• Access files only from their personal computer

• Sign in to any computer on the network and access their files

• Use the network only during specific hours

• Connect to the network without a password

Answer explanation

Roaming access allows users to sign in to any computer on the network and access their files, providing flexibility and convenience for users who need to work from different locations within the network.

What is the primary purpose of a network?

• To increase the number of devices in a home

• To facilitate communication between connected devices

• To reduce the cost of individual devices

• To make devices more complex

Answer explanation

The primary purpose of a network is to facilitate communication between connected devices, allowing them to share data and resources effectively. This is essential for collaboration and efficient operation in various environments.

Network ​ (a)   is about response time - how fast a message can be sent or how quickly a document can be retrieved. The performance of a ​ (b)   can be affected by various factors: the number of devices on the network, the ​ (c)   of the transmission medium, the type of network traffic. network ​ (d)   and the number of transmission errors

• performance
• network
• bandwidth
• latency
• throughput
• capacity
• reliability

Network ​ (a)   is a measure of how long it takes a message to travel from one device to another across a network. A ​ (b)   with low latency experiences few delays in ​ (c)   , whereas a high latency network experiences many delays. The more delays there are, the longer it takes to transmit ​ (d)   across a network.
Latency is affected by the number of ​ (e)   on the network and the type of connection device.

• latency
• network
• transmission
• data
• devices
• bandwidth
• protocols
• packets

A network ​ (a)   controller (NIC) provides a method of ​ (b)   to a network. A NIC offers an interface port for a ​ (c)   connection. A ​ (d)   NIC provides a radio transceiver for connecting wirelessly.
Most modern PCs come with a NIC and wireless NIC built in, providing the option of either connection method. However, mobile devices such as tablets, smartphones and many embedded devices only feature a wireless NIC, giving only wireless ​ (e)   .

• interface
• connecting
• wired
• wireless
• connection
• disconnection
• removal
• disabling

Routers are one of the most commonly used connection devices. They are used to send ​ (a)   signals across the ​ (b)   . Routers work by collecting knowledge of available routes to ​ (c)   data. They then determine the most suitable route for sending data.
Routers are also commonly used in homes. These types of router usually contain a hub and a WAP, enabling a small peer-to-peer network to be formed. Additionally, they contain a ​ (d)   , which allows users to connect to the ​ (e)   .

• data
• internet
• modem
• transmit
• switch
• hub
• satellite
• printer

Organisations that have more than one office or branch, such as banks, tend to use a (a)   . The WAN allows the head office to (b)   and share data with the sub-offices and branches. Communication is done through national (c)   infrastructures or via wireless transmission. Each office or branch has its own (d)   that is connected together using the WAN.

• WAN
• communicate
• telephone
• LAN
• PAN
• VPN
• Ethernet