What are the types of cable?

A.twisted pair
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.

1.Shielded Twisted Pair (STP)-Shielded Twisted Pair (STP) Cable. 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.

2..Unshielded twisted pair (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-Coaxial cable, or coax, is a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield. Many coaxial cables also have an insulating outer sheath or jacket. 

D.Fiber Optic-Fiber optic cable is a high-speed data transmission medium. It contains tiny glass or plastic filaments that carry light beams. Digital data is transmitted through thecable via rapid pulses of light.

What is the difference between straight and cross cable?

Straight-through Ethernet cables are the most commonly used. Crossover cables use two different 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.

https://searchdatacenter.techtarget.com/definition/twisted-pair

https://www.techopedia.com/definition/14153/shielded-twisted-pair-stp

https://www.fiberoptics4sale.com/.../95046918-what-is-unshielded-twisted-pair-utp-cabl...

https://en.wikipedia.org/wiki/Coaxial_cable

https://techterms.com/definition/fiber_optic_cable

www.cables-solutions.com/difference-between-straight-through-and-crossover-cable.html

What are the types of network topology?

What is a network topology?

-Network topology is the arrangement of the elements of a communication network. Network topology is the topological structure of a network and may be depicted physically or logically.

Linear bus 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, all network transmission is halted.

Star topology

-Alternatively referred to as a star network, star topology is one of the most common network setups. In this configuration, every node connects to a central network device, like a hub, switch, or computer. The central network device acts as a server and the peripheral devices act as clients. Depending on the type of network card used in each computer of the star topology, a coaxial cable or a RJ-45 network cable is used to connect computers together.

Ring topology

-A ring network is a network topology in which each node connects to exactly two other nodes, forming a single continuous pathway for signals through each node.

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.

Mesh topology

-A mesh network is a local network topology in which the infrastructure nodes connect directly, dynamically and non-hierarchically to as many other nodes as possible and cooperate with one another to efficiently route data from/to clients.

https://www.computerhope.com/jargon/l/linear-bus-topology.htm

www.telecomabc.com/s/star.html

https://en.wikipedia.org/wiki/Ring_network

https://www.computerhope.com/jargon/h/hybrtopo.htm

https://www.link-labs.com/blog/what-is-mesh-topology

What are the types of computer network?

What is a computer network?
A computer network, or data network, is a digital telecommunications network which allows nodes to share resources. In computer networks, computing devices exchange data with each other using connections between nodes.



LAN (local area network)
A local area network is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building.

MAN (metropolitan area network)

A metropolitan area network 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 but smaller than the area covered by a wide area network.

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.

PAN (personal are 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. 

https://en.wikipedia.org/wiki/Computer_network

https://en.wikipedia.org/wiki/Local_area_network

https://en.wikipedia.org/wiki/Metropolitan_area_network

https://en.wikipedia.org/wiki/Wide_area_network

https://en.wikipedia.org/wiki/Personal_area_network

How to be a responsible netizen?

To b a responsible netizen you must have good manners by using the internet,use internet wisely and carefully because some sites have unpleasant content,don't use the net just for posting uncommon things we must use it correctly for example if we have some Homework to do by searching the meaning we can get the answer the simple is that.

Don't use the net by putting shame on others,respect each other as you wanted to be respected.we should take care of our privacy we can't share our privacy trust is not easy in this world nowadays so we must take care of our accounts.Surfing the net in a long time is not good for your health.To be a responsible netizen we will use the internet to prevent any dangerous situations.Beware of scams using the internet.

https://study.com/academy/lesson/social-media-responsibility-etiquette.html