ICT Section 39

Section 39  24.7.14

This coming holiday , Mr.Z informed us to do some homework . Although this holiday is for Hari Raya celebrating seasons , as an ICT student , we might not be lazy . We have to find out some information that we do not know in ICT world.

I am appreciated that this holiday might be useful for me. It will be great if I have found out some interested things in ICT that I do not know ...

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ICT Section 38

Section 38  22.7.14

Cable section.

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ICT Section 37

Section 37  17.7. 14

Today is the day that we were doing the network facilities setup activity.
Cross cable & Straight cable

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ICT Section 36 (Network Facilities Setup)

Section 36   15.7.14

Students have to complete all fourth tasks:
1. Crimp a straight cable
    a. Skin off the cable jacket
    b. Untwist and straighten each wire
    c. Arrange the wire according to the 568B wiring schematic order for both ends
    d. Cut and insert the wires into using RJ45 connector.
    e. Crimp the cable using a crumping tool.

2. Check the straight cable is crimped successfullly using a cable tester

3. Crimp a crossed cable

4. Check the crossed cable  is crimped successfully using a cables tester

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ICT Section 35

Section 35   10.7.14

Network Interface card

Short for Network Interface Card, a NIC is also commonly referred to as an Ethernet card and network adapter and is an expansion card that enables a computer to connect to a network such as a home network or the Internet using an Ethernet cable with a RJ-45 connector.

 RJ-45 connector.

• RJ45 (telecommunications), a connector used for modem connections

Straight cable

Cross cable

A crossover cable connects two devices of the same type, for example DTE - DTE or DCE - DCE, usually connected asymmetrically (DTE-DCE), by a modified cable called a cross link

What is the defference between Cross Cable and Straight Cable

 Straight and crossover cable can be Cat3, Cat 5, Cat 5e or Cat 6 UTP cable, the only difference is each type will have different wire arrangement in the cable for serving different purposes.

Straight Cable
Usually use straight cable to connect different type of devices. This type of cable will be used most of the time and can be used to:
1) Connect a computer to a switch/hub's normal port.
2) Connect a computer to a cable/DSL modem's LAN port.
3) Connect a router's WAN port to a cable/DSL modem's LAN port.
4) Connect a router's LAN port to a switch/hub's uplink port. (Normally used for expanding network)
5) Connect two switches/hubs with one of the switch/hub using an uplink port and the other one using normal port.
If you need to check how straight cable looks like, it's easy. Both sides (side A and side B) of cable have wire arrangement with same color.

Crossover Cable
Sometimes you will use crossover cable, it's usually used to connect same type of devices. A crossover cable can be used to:
1) Connect two computers directly.
2) Connect a router's LAN port to a switch/hub's normal port. (Normally used for expanding network)
3) Connect two switches/hubs by using normal port in both switches/hubs.
In you need to check how crossover cable looks like, both side (side A and side B) of cable have wire arrangement with following different color.
This cable (either straight cable or cross cable) has total 8 wires (or we can say lines), i.e. four twisted pairs (4x2=8) with different color codes. Right now just forget about color codes. It doesn’t matter what color is given to the cable (but there is a standard).

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ICT Section 34

Section 34     8.7.14

Red Hat Linux, assembled by the company Red Hat, was a popular Linux based operating system until its discontinuation in 2004
  
 Three types of client software
 We often hear about vulnerabilities in client software, such as web browsers and email applications, that can be exploited by malicious content.

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ICT Section 33

Section 33    3.7.2014

The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite (TCP/IP) to link several billion devices worldwide.

An intranet is a computer network that uses Internet Protocol technology to share information, operational systems, or computing services within an organization. This term is used in contrast to extranet, a network between organizations, and instead refers to a network within an organization. 

An extranet is a computer network that allows controlled access from outside of an organizations intranet. Extranets are used for specific use cases including business-to-business (B2B).

In computing, a firewall is a software or hardware-based network security system that controls the incoming and outgoing network traffic based on applied rule set. A firewall establishes a barrier between a trusted, secure internal network and another network (e.g., the Internet) that is not assumed to be secure and trusted.

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ICT Section 32

Section 32  1.7.2014

Network Communication Technology

• Intranet
• internet
• extranet

Protocol - a protocol is the special set of rules that end points in a telecommunication connection use when they communicate. Protocols specify interactions between the communicating entities. 

3 types of topology
http://compnetworking.about.com/od/networkdesign/a/topologies.htm

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ICT Section 31

Section 31  29.6.15

A client is a computer program that, as part of its operation, relies on sending a request to another computer program(which may or may not be located on another computer). For example, web browsers are clients that connect to web servers and retrieve web pages for display. Email clients retrieve email from mail servers. Online chat uses a variety of clients, which vary depending on the chat protocol being used. Multiplayer video games or online video games may run as a client on each computer. The term "client" may also be applied to computers or devices that run the client software or users that use the client software.

Peer-to-peer (P2P) computing or networking is a distributed application architecture that partitions tasks or work loads between peers. Peers are equally privileged, equipotent participants in the application. They are said to form a peer-to-peer network of nodes.

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