L3 Computer nertwork

Learning Outcome 2: Understand the key components used in networking.

Network devices 

What is Workstation? function and diagram

• Workstation is a computer dedicated to a user group engaged in business or professional work.
• Workstation functions perform administrative tasks on a local or remote workstation.

What is NIC? function and diagram

• NIC is stand for network interface card.
• NIC is a circuit board or card that is installed in a computer so that it can be connected to a network.
• The function is a middleman between your computer and the data network. 

Types of servers:

Print server can manages print requests and makes printer status information available to end users and network administrators. the function accepts print jobs from the computers and sends the jobs to the appropriate.

Mail server a mail transport agent is a application that receives in coming e mail from local users within the same domain and remote senders and forwards outgoing email for delivery.

Web server are a remote computers or computer programs that deliver web content like web pages to the user over the internet upon through a web browser. features of web server large data storage support, bandwidth controlling to regulate network traffic, virtual hosting and server side web scripting.

Proxy server is a dedicated computer or a software system running on a computer that acts as an intermediary between an endpoint device, such as a computer , and another server from which a user or client is requesting a service.

File server is a computer responsible for the central storage and management of data files so that other computer on the same network can access the files.

Interconnection devices 

What is Router? the purpose, features and functions 

Router is a device located at the boundary of a network that connects to other networks 

The purpose of a router is to connect multiple networks and forward packets destined either for its own networks or other network.

Features and functions 

• Connect dissimilar networks.
• Prevent certain types of traffic from getting to a network.

What is Switch? the purpose, features and functions 

Switch is a device that channels incoming data from any of multiple input ports to the specific output port that will take the data toward its intended destination.
The purpose of a switch is to refers a multi-port network bridge that processes and routes data at the data link of the OSI model. 

Function is used to access or OSI layer 2 to the network.
Features for switch is change a switch password and update a switch firmware.

What is Wireless Access Point? the purpose, features and functions 

Wireless Access Point is a hardware device or configured node on a local area network LAN that allows wireless capable devices and wired network to connect through a wireless standard.
The purpose of a wireless access point is
Function is to transmitting and receiving wireless signal in the network.
Features for Wireless Access Point is  can reset the access point to the factory default configuration. 

Slideshare.net. (2018). Print server. [online] Available at: https://www.slideshare.net/catacutanjcsantos/print-server-59531833 [Accessed 29 May 2018].

Lifewire. (2018). What is a Network Switch?. [online] Available at: https://www.lifewire.com/what-is-a-network-switch-2618163 [Accessed 30 May 2018].

Tech (2012). Network switches, functions & role in networks. [online] Slideshare.net. Available at: https://www.slideshare.net/irisdan/network-switches-functions-role-in-networks [Accessed 30 May 2018].

What is mail server (mail transfer/transport agent, MTA, mail router, Internet mailer)? - Definition from WhatIs.com. (2018). SearchMicroservices. Retrieved 3 June 2018, from https://searchmicroservices.techtarget.com/definition/mail-server-mail-transfer-transport-agent-MTA-mail-router-Internet-mailer

Proxy server functions. (2018). SearchSecurity. Retrieved 3 June 2018, from https://searchsecurity.techtarget.com/answer/Proxy-server-functions

What is file server? - Definition from WhatIs.com. (2018). SearchNetworking. Retrieved 3 June 2018, from https://searchnetworking.techtarget.com/definition/file-server

Wireless Technologies

1. 802.11

Description 
802.11 is a local area networks (WLANS) use the Ethernet protocol developed by a working group of the institute of electrical and electronics engineers (IEEE).

Diagram

2. Infrared

Description
Infrared technology allows computing devices to communicate via short-range wireless signals. with infrared, computers can transfer files and other digital data.

Diagram

3. Bluetooth

Description 
Bluetooth is defined as being a short range radio technology aimed simplifying communications among internet devices and between devices and the internet.

Diagram

4. 3G

Description
3G is the third generation of wireless technologies. mostly used with mobile phones and handsets as a means to connect the phone to the internet or other IP networks in order to make voice and video calls, to download and upload data, and to surf the web.

Diagram

The differences between the various types of 802.11:

• 802.11b - is often considered the first generation.
• 802.11g - is often considered the third generation.
• 802.11n - is often considered the fourth generation.

Network protocol & standards

Network protocols & standards types

• TCP/IP- Transmission Control Protocol/ Internet Protocol is a suite of communication protocol used to interconnect network devices on the internet. 

• UDP- is stand for User Datagram Protocol meaning  the sender will not wait to make sure  the recipents received the packet it will just continue sending the next packets.

• AppleTalk- is a set proprietary networking protocols developed by Apple computer only. 

• 802.2-  General standard for the data link layer in the OSI reference model. IEEE 802.2 Logical link control 

• 802.3- Defines the MAC layer for bus networks that use CSMA/CD. This is the basis of the Ethernet standard.

• FDDI- Is stand for fiber distributed data interface data transmission on fiber optic lines in a local area network (LAN)

• 802.5- IEEE 802.5: Defines the MAC layer for token-ring networks.

Techopedia.com. (2018). What is AppleTalk? - Definition from Techopedia. [online] Available at: https://www.techopedia.com/definition/2631/appletalk [Accessed 1 May 2018].

Webopedia.com. (2018). What is IEEE 802 Standards? Webopedia Definition. [online] Available at: https://www.webopedia.com/TERM/I/IEEE_802_standards.html [Accessed 1 May 2018].

SearchNetworking. (2018). What is FDDI (Fiber Distributed Data Interface)? - Definition from WhatIs.com. [online] Available at: https://searchnetworking.techtarget.com/definition/FDDI [Accessed 1 May 2018].

SearchNetworking. (2018). What is TCP/IP (Transmission Control Protocol/Internet Protocol)? - Definition from WhatIs.com. [online] Available at: https://searchnetworking.techtarget.com/definition/TCP-IP [Accessed 1 May 2018].