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Flashcards in Networking and Internet Deck (36)
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1

Protocol

A standard set of rules that allows devices to communicate successfully. E.g. TCP
Specify data formats. eg linking computer to a printer

2

Standard

Guidelines to ensure that manufacturers of network equipment create product that are compatible with other manufacturers’ products. E.g. RJ45 connector

3

Protocol Stack

A group of protocols which allows all devices on a network (and internet) to communicate irrespectively of the equipment used.

4

HTTP

Hyper text Transfer protocol:
Transferring (request and view)multimedia web
pages over the internet - Application Layer

5

FTP

File transfer protocol:
Copying a file from one location to another over the
internet - Application Layer

6

SMTP

Simple mail Transfer protocol:
Mail applications typically use SMTP only for sending
email messages - Application layer

7

IMAP

Internet Message Access protocol:
Transferring emails between computer systems via
the internet - Application layer

8

DHCP

Dynamic Host Configuration Protocol:
a client/server protocol that automatically provides
an Internet Protocol (IP) host with its IP address
and default gateway - Application layer

9

UDP

User Datagram protocol:
Sending datagrams across a network with very
few error recovery services.- Transport layer

10

TCP

Transmission Control protocol:
Error control protocol defined for high-speed
communications within a network. - Transport layer

11

Handshaking

The exchange of signals between devices to establish their readiness to communicate

12

Internet

Global network of interconnected networks that use IP addresses and TCP/IP

13

Intranet

A private network within an organization for employees. It uses internet technology, e.g. browsers & hyperlinks to allow communication.

14

Extranet

A website that allows external stakeholders to access information usually by the use of usernames and passwords

15

World Wide Web

A collection of documents and other resources identified by URLs, interlinked by hypertext links, and accessed via the Internet

16

WAN

A set of links that connect geographically remote computers and local area networks

17

LAN

Group of devices, computers, printers, scanners under the control of one organization in a small geographic area

18

Gateway

Device that connects networks that use different protocols

19

Server

A software process that provides a service requested by a client

20

Client

A software process that requests and uses the services provided by a server

21

MAC
(address)

A media access control address also called physical address, is a unique identifier assigned to network interfaces for communications on the physical network segment.

22

IP (v4) address

A unique address that identifies a device on a network. 32 bits e.g. 192.168.168.5

23

IP Header

•Version - IPv4 / 6
•Total length - typically 64 bytes and 1500 bytes
•Identification - unique packet sequence number
•TTL - (Time to Live) decremented by 1 by each router until 0 when it is dropped.
•Protocol - The protocol of the transport layer
•Header checksum - Calculated at each hop to make sure that the header was not corrupted.
•Source IP address
•Destination IP address

24

Switch

Networking device that connects devices together on a (in one network) network using the MAC address, by using packet switching to receive, process and forward
data to the destination device.

25

Router

device that connects networks that use the same protocol. It forwards packets by using the IP address.
Holds addresses of other devices in network so data sent to correct destination

26

TCP/IP

A set of working practices that allow all internet users to communicate with each other whatever their equipment

27

Application Layer

Governs how two applications work with each other

28

Transport Layer

Establishes the connection between applications (end
points) and governs aspects of end-to end communication between two end hosts. Splits message
up in packets, adds error checking details and port
numbers.

29

Network Layer

Governs the transmission of packets across the internet –
typically by sending them through several routers along
the route. IP address of sender and receiver are added
to the packet.

30

Data Link Layer

Governs the transmission of frames across a single
network and is responsible for creating the frames that
move across the network.