WHAT ARE THE TYPES OF CABLE?

A.TWISTED PAIR

is the ordinary copper wire that connects home and many business computers to the telephone company. To reduce crosstalk or electromagnetic induction between pairs of wires, two insulated copper wires are twisted around each other.

       a.STP

is similar to UTP but with each pair covered by an additional copper braid jacket or foil wrapping. This shielding helps protect the signals on the cables from external interference.

     b.UTP
Short for , unshielded twisted pair a popular type of cable that consists of two unshielded wires twisted around each other. Due to its low cost, UTP cabling is used extensively for local-area networks (LANs) and telephone connections.

B.COAXIAL
Coaxial cabling has a single copper conductor at its center. A plastic layer provides insulation between the center conductor and a braided metal shield (See fig. 3). The metal shield helps to block any outside interference from fluorescent lights, motors, and other computers.

C.FIBER OPTIC 

consists of a center glass core surrounded by several layers of protective materials (See fig. 5). It transmits light rather than electronic signals eliminating the problem of electrical interference. This makes it ideal for certain environments that contain a large amount of electrical interference. It has also made it the standard for connecting networks between buildings, due to its immunity to the effects of moisture and lighting.

Explain the difference between straight-through cable and cross-over cable.

STRAIGHT-THROUGH CABLE

A straight through cable is a type of twisted pair cable that is used in local area networks to connect a computer to a network hub such as a router.

CROSS-OVER CABLE

An Ethernet crossover cable is a type of Ethernet cable used to connect computing devices together directly.

SOURCE:https://fcit.usf.edu/network/chap4/chap4.htm

What are the types of network topology?

LINEAR BUS TOPOLOGY
s 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, all network transmission is halted.

STAR TOPOLOGY

all computers and devices are connected to a main hub or switch. The hub or switch amasses and disburses the flow of data within the network. Star topology is the most common type of network and follows the Ethernet standard.

RING TOPOLOGY

computers and devices are connected to a closed loop cable. Here there are no terminating ends so if one system crashes the entire network goes down. Each computer functions as a repeater and charges the signal before sending it to the next station.

MESH TOPOLOGY

A mesh topology can be a full mesh topology or a partially connected mesh topology. In a full mesh topology, every computer in the network has a connection to each of the other computers in that network

BUS TOPOLOGY

 – in this arrangement computers and devices are connected to a single linear cable called a trunk. The trunk is also referred to as the backbone or a segment. Each end of the trunk must be discharged to prevent the signal from rebounding back up the cable.

HYBRID TOPOLOGY

Hybrid topology is an integration of two or more different topologies to form a resultant topology which has many advantages (as well as disadvantages) of all the constituent basic topologies rather than having characteristics of one specific topology.

SOURCE:

https://www.cybrary.it/study-guides/cissp/types-of-network-topologies/

sources:
https://www.computerhope.com/jargon/s/startopo.htm