Wednesday, 10 October 2018

what are the types of cable?

A.Twisted Pair
a.STP
-Shielded twisted pair is a special kind of copper telephone wiring used in some business installations. An outer covering or shield is added to the ordinary twisted pair telephone wires; the shield functions as a ground.

b.UTP
-UTP cable is a 100 ohm copper cable that consists of 2 to 1800 unshielded twisted pairs surrounded by an outer jacket. They have no metallic shield. This makes the cable small in diameter but unprotected against electrical interference. The twist helps to improve its immunity to electrical noise and EMI.

c.coaxial cable

d.fiber optic
-An optical fiber cable, also known as a fiber optic cable, is an assembly similar to an electrical cable, but containing one or more optical fibers that are used to carry light.

What is the difference between straight cable and cross cable
-Straight-through Ethernet cables are the most commonly used. Crossover cables use twodifferent wiring standards: one end uses the T568A wiring standard, and the other end uses the T568B wiring standard. ... For example, a computer with Auto MDI-X can use either a straight-through or crossover cable for any application.




Wednesday, 22 August 2018

What are the types of network topology?

Linear bus topology- is a type of network topology in which each device is connected one after the other in a sequential chain (shown right). In this case, the bus is the network connection between the devices, and if any link in the network chain is severed.
Star Topology- uses a central device called a hub (a more efficient device called "switch" is also used) with cables extending in all directions.

Ring Topology- is a tube of network topology where in nodes are connected to each other forming one.

Mesh Topology- are structures where in all the nodes on the network can route data traffic on their own.
Hybrid Topology- uses a mix of any two or more different topologies in such a way that the final work does not exhibit on of the characteristics of the standard topologies.

What are the types of computer network?

LAN- (Local Area Network)
local area network (LAN) is a group of computers and associated devices that share a common communications line or wireless link to a server. Typically, a LAN encompasses computers and peripherals connected to a server within a distinct geographic area such as an office or a commercial establishment.


MAN- (Metropolitan Area Network)
A metropolitan area network (MAN) is a computer network that interconnects users with computer resources in a geographic area or region larger than that covered by even a large local area network (LAN) but smaller than the area covered by a wide area network (WAN).



PAN- (Personal Area Network)
A personal area network is a computer network for interconnecting devices centered on an individual person's workspace. A PAN provides data transmission amongst devices such as computers, smartphones, tablets and personal digital assistants.




WAN- (Wide Area Network)
A wide area network is a telecommunications network or computer network that extends over a large geographical distance/place. Wide area networks are often established with leased telecommunication circuits.
https://www.webopedia.com/TERM/L/local_area_network_LAN.html



Wednesday, 11 July 2018

How to be a responsible netizen?



FIRST! We should know what a netizen is. A netizen is ANYONE/EVERYONE. A netizen is someone who uses the Internet in many purposes: communicating, blogging, uploading photos, researching and etc. Now, being a responsible netizen, means you respect everyone using the Internet. CYBERBULLYING someone doesn't only mean creating Facebook pages that bash people, but also making a comment that might hurt other's feelings. Cyberbullying happens to a lot of people so don't feel bad if you are one of them. Here's a tip: You should watch what you post, comment, upload or even share that might hurt other people.

Image result for cyber bullying
SECOND! we use Internet as our guide in researching for our school works, office works, research papers and etc. BUT! How sure are we that the information in the Internet is credible enough? For example, you have a research for your school work, should you base on just one source only? Of course NOT. Another example, the wikipedia, it is a FREE ONLINE encyclopedia, created and edited by volunteers around the world and hosted by Wikimedia Foundation. Little did you know that this online encyclopedia allows people to edit some informations? Yes, it's right. What IF there is a person who did some trippings about the information in this encyclopedia? See? Don't just base on a one source, look for other sources that can help you with your research thingy.



Image result for school works