Module 2 Network Components , Types, and Connections

What is a Host

All computers connected to a network that participates directly in network communication.

What can hosts do ?

Can send and receive messages on the network. and can act as both a client and a server or both

What is a server ?

are hosts that have software installed in them that enable them to provide information , like web pages and email to other hosts on the network.

What is a client ?

are computer hosts that have software installed in them that enables the host to request and display info from the server

What is an example of a server ?

Email server runs email server software

What is an example of a client ?

Mail client such as outlook to access the email on the server

what is a Peer-to-Peer Network ?

When a computer runs client and server software at the same time.

What is the simplest P2P network consist of ?

The simplest P2P network consists of 2 computers directly connected to each other using wired/wireless connection.

How to create a larger P2P network and what does it require ?

Multiple PCs can be connected to create a larger P2P network but require a network device , such as a switch to connect the computers.

What is the advantages of P2P networking ?

Easy to set up

less complex

lower cost because netowork devices and dedicated servers may not be requires

What is the disadvantages of P2P networking ?

No centralized administrator

Not as secure

Not Scalable

All devices may act as both client and server which can slow performance

What is Peer-to-Peer applications ?

allows a device to act as a both a client and a server within the same communication.

What does P2P applications require ?

P2P applications require that each end device provide a user interface and run a background service.

What system do some P2P applications use ?

Some P2P applications use a hybrid system where resource sharing is decentralized (from another users computer), but indexes that point to the location are stored in a centralized (one central server) directory.

What is the hybrid system used in P2P applications ?

In a hybrid system , each peer accesses an index server (central directory where to find specific files or resources stored on other devices in the network) to get the location of a resource stored on another peer.

Can a computer with server software provide services to one or many clients ?

A computer with server software can provide services simultaneously to one or many clients.

Can a computer run multiple types of server software's and give examples ?

A single computer can run multiple types of server software.

one computer can act a a file server, web server , and an email server.

Can a single computer run multiple client software ?

A single computer can run multiple client software.

with multiple clients installed , a host can connect to multiple servers at the same time.

Give an example of of a computer running multiple clients ?

a user can check email and view a web page while instant messaging

What is end device ?

Form the interface between users and the underlying communication network.

Examples of end devices ?

Desktop , laptop , printer , wireless tablet

What is a Intermediary Device ?

An intermediary device is network hardware—that connects individual end devices to the network and manages the flow of data between them.

What is examples of Intermediary Devices ?

such as a switch, router, or firewall

What is network Media ?

Network media is the actual physical cabling or wireless channels (such as copper wires, fiber-optic cables, or radio waves) used to interconnect devices and transmit data across a network.

What is ISP ?

(Internet Service Provider) : provides the link between the home network and the internet.

How does a ISP work ?

Each ISP connects to other ISPs to form a network of links that interconnect users all over the world. ISPs are connected in hierarchical matter that makes sure that internet traffic takes the shortest past from the source destination.

What is the primary medium that connects the internet backbone?

fiber optic cables underground and undersea.

Which ISP connection option should not be used it leaves your computer unprotected ?

a modem that is direct connection between a computer and the ISP.

What is required to securely connect a computer to the ISP ?

A integrated router is required to securely connect a computer to the ISP.The router includes a switch to connect wired hosts and a wireless Access Point to connect wireless hosts.

What is a router ?

is a networking device that forwards data packets between different computer networks, essentially acting as a traffic cop to direct internet data to its correct destination

What is a switch?

the switch looks at the specific destination address (MAC address) and forwards that data only to the intended device, rather than broadcasting it to everyone.

What is a inside host ?

is a computer or device that is located within a private, internal network which is protected from the public by a firewall or router.

What is a Cable connection ?

Typically offered by cable television service providers, the internet data signal is carried on the same coaxial cable that delivers cable television. It provides a high bandwidth, always on, connection to the internet.

How does cable connection work ?

a special cable modem separates the internet data signal from other signals carried on the cable and provides Ethernet connection to a host or LAN.

What is LAN ?

Local Area Network, which is a private computer network that connects devices within a limited geographic area, such as a single home, school, or office building

What is DSL ?

Digital Subscriber Line provides a high bandwidth, always on, connection to the internet. It requires a special high-speed modem that separates the DSL signal from the telephone signal and provides an Ethernet connection to a host computer or LAN.

What does DSL run through and what 3 channels is it split into ?

DSL runs through telephone lines and the 3 channels are voice , download , and upload

what is Cellular Connection ?

Cellular internet access uses a cell phones network to connect

what is Satellite connection ?

is a wireless internet service that transmits data via radio signals between a user's satellite dish on Earth and a spacecraft orbiting the planet. Requires a clean line of sight to the satellite and difficult in heavy wooded areas or overhead obstructions.ideal for remote or rural areas

What is dial up telephone connection ?

low-bandwidth internet service that uses a standard telephone line and a modem to convert data into audible signals, temporarily tying up the phone line while connected.