Networks

Question 1

What is a Network?

Answer 1

A network is two or more devices connected to each other with a physical medium, such as wires or radios signals allowing them to exchange data.

Question 2

What is a LAN?

Answer 2

A local area network is a group of computers or devices that are confined to a small geographical area, share a common communication medium(cables or wirless) and are connected to a central connecting device like a hub, switch or router.

Question 3

What is network documentation?

Answer 3

Defines, describes and explains the physical and logical method for connecting devices.

Question 4

What are central connecting devices?

Answer 4

Hub, switch, router.

Question 5

What is the purpose of central connecting devices?

Answer 5

To relay data between host machines.

Question 6

What is a host?

Answer 6

Any device with an IP address.

Question 7

What do hubs do?

Answer 7

They receive data from hosts and broadcast to all other hosts on that network. Very dated!

Question 8

What do switches do?

Answer 8

They send and receive data simultaneously and direct the data to its intended destination.

Question 9

What are routers?

Answer 9

They connect us to the internet and act as a gateway to other networks, they allow communication between hosts on different networks.

Question 10

How do devices connect?

Answer 10

Through network adapters aka. Network interface cards (NICs) allow computers to connect to networks.

Question 11

What ports do wired network adapters use?

Answer 11

RJ45

Question 12

How do wireless network adapters connect to networks?

Answer 12

By using wireless network points (WAPs)

Question 13

What are WAPs connected to?

Answer 13

Switches and routers.

Question 14

How is data transfer rate measured?

Answer 14

Mega bits per second (MbPS) the bitrate.

Question 15

What are frames?

Answer 15

A sequence of bits containing a detectable beginning and end of a packet in the stream of bits.

Question 16

How does a frame help a switch?

Answer 16

It includes the physical address that helps determine where to send data.

Question 17

Explain the client-server model.

Answer 17

Servers are computers dedicated to providing specific types of services or data.
A client (a computer) uses software to ask a server for data or services.
The server provides the data or service to the client.

Question 18

What does Topology mean?

Answer 18

The interconnected pattern of network elements.

Question 19

What is Cisco Meraki?

Answer 19

Cloud controlled WIFI, routing and security.

Question 20

What is TCP/IP

Answer 20

Transmission Control Protocol/Internet Protocol is the language a computer uses to access the internet.

Question 21

What are protocols?

Answer 21

Clearly defined rules and procedures that allow different manufacturers to create hardware and software that work together at a SPECIFIC LAYER.

Question 22

What is a Virtual Private Network?

Answer 22

A VPN is a private network built over a public infrastructure. Encryption allows users to securely access the network via the Internet.

Question 23

What is a WAN?

Answer 23

A WAN connects more than one LAN and is used for larger geographical areas. WANs are similar to a banking system, where hundreds of branches in different cities are connected with each other in order to share their official data.

Question 24

What is protocol analysis aka:
Network analyzer
Protocol analyzer
Ethernet sniffer
Wireless sniffer

Answer 24

Computer program or hardware that can intercept & log traffic that passes over a digital network or part of a network.

Question 25

DNS

Answer 25

Domain Name System
Hierarchical naming system built on a distributed database. This system transforms names to IP addresses & makes it possible to assign mans to groups of Internet resources & users, regardless of the entities physical location.

Question 26

DHCP

Answer 26

Dynamic Host Configuration Protocol
A network management protocol that dynamically assigns an IP address to any new node entering the network. Avoiding the involvement of a network administrator.

Question 27

VPN

Answer 27

Virtual Private Network

A private network built over a public infrastructure. Encryption allows VON users secure access via the Internet.

Question 28

What does a modem do that a router doesn’t?

Answer 28

Encodes & decodes data so that it can pass from home network to Internet Service Provider. The router directs the information collected by the modem to devices within the network. The modem brings the information in & the router distributed it to different devices.