Network Cable

The following are types of cables used in computer networks.
Network Cable
The network cable is used to connect to and transfer data between computers and the network. There are several types of network cables and the right type to use, depends on the structure and topology of your network. The examples of network cables are Twisted pair, Coax, Ethernet and fiber optic junction.

Unshielded Twisted Pair-UTP
The UTP (unshielded twisted pair) is used in many Ethernet networks. It consists of four couples who accommodated in the cable covering. Each pair is rotated in some additional twists to disturbance of other devices on the network. The structure of this type of cable increases the reliability and helps minimize network failures.

Coaxial Cable
The coaxial cable or coax another important type of network cable. It has a copper conductor in the middle of it and a plastic coating acts as an insulator between the Central conductor and a metal shield. The cable is then covered with a coating. The lining can think or thick-thicker padding that less flexible is an extra protection.

Ethernet Cable
The Ethernet crossover cable is used to a computer network consists of two or more computers to connect. This type of network cable eliminates the need for network switches and routers. The cable also connects computers using their network adapters, such as a network interface card (NIC).

Fiber Optic Cable
The fiber optic grid is used for networks that extend over large distances. The fiber optic cable consists of several layers, protective lining. Also sends light in contrast to electrical signals as other cables. This feature of fiber optic cable makes it an ideal cable for  large amounts of electrical interference in the network. It transmits information at high speed and is therefore used in large network environments such as those used by large companies.

Network Threats or Viruses

There are many network threats today, which are spread over the internet. The most common include the following.

1-Viruses

2-Worms

3-Trojan horses 

4-Spyware 

5-Zero-day attacks, also called zero-hour attacks 

6-Denial of service attacks 

1-Viruses

-    A virus is a computer code (written with the express intention to replicate itself) that can attach itself to a program, file, hardware and can spread computer to computer.

-    As a virus move from one computer to another it damages hardware, software and files also.

2-Worms

-    Worms are subclasses of viruses, it can spread itself without user action across the network.

-    Worms are just like viruses, but the worms have ability to spread themselves so automatically and rapidly.

-    For example, if there is a worm in your system, then it can send itself by email to all of your contacts and then these computers further send worms. This causes a heavy stream of network traffic, which can slow down business networks by using network bandwidth.

3-Trojan Horses

-    Trojan horses appear to be software, but they compromise with your security and can damage your network hardware, files. 

4-Spyware

-    Spyware is a general term that is used to describe software which performs the following actions on your computer without your consent (permission).

1-    Advertising

2-    Collection of personal information.

3-    Changing the configuration of your computer.

Above action can slow down or damage your computer.

Spyware can come in the following ways.

1-    Application/software installation.

2-    Email.

3-    Web sites.

5-Zero Day/Zero Hour Attack

-    Zero day/zero hour attacks those tries to destroy computer hardware, files and software and about which vendors have no information.

-    There is no security available for zero day/zero hour attacks.

6-Denial of Service Attack

-    DOS or DDOS is an attempt to make resources unavailable to its intended user.

-    One common method of DOS or DDOS is penetrating the target machine with external communication requests.