1.3.2 Flashcards by Connie Feeney

modes of connection

-wired connection
-wireless connection

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what is wired connection?

connected with physicals

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examples of wired connection

ethernet

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what is wireless connection?

connected using wireless technology

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examples of wireless connection

Wi-Fi and Bluetooth

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what is ethernet?

family of networking rules or protocols used in LANs

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benefits of ethernet

-higher bandwidth which allows transmission of lots of data
-avoids data collisions and has less interference
-difficult for unauthorised users to intercept data
-secure, stable and reliable connections
-faster speed and suitable for long distance

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drawbacks of ethernet

-expensive to set up
-can’t instantly move a device
-requires more time to install
-has too many cables lying around

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different types of transmission media

-twisted pair cable
-coaxial cable
-fibre optic cable (made of glass)

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drawbacks of WAP

-bandwidth stealing
-confidentiality

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benefits of WAP

-portable
-easy to use
-fast and efficient

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is ethernet a protocol?

yes

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does ethernet uses wireless transmission data?

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can ethernet transmit data at speeds of up to 100 Gbits per second?

yes

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how many bits long is IPv4?

32 bits

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what is IPv4 made up of?

-network identifier (identifies the network the traffic needs to go to, first three bytes)
-host identifier (host device where the traffic needs to go to, last byte)

how many bits long is IPv6?

128 bits

IP address

-assigned permanently by administrator
-to conserve IP addresses they often assigned dynamically by the network when a device connects and change over time to allow reuse (dynamic task configuration protocol)
-networks will often have their own subnet address

MAC address

-media access control address
-used to route the frames on a LAN
-usually displayed as a 12 digit hexadecimal number
-devices may have two MAC addresses, one for wired and ne for wireless
-every MAC address is unique and unchangeable

protocols

set of rules that define how devices communicate

TCP / IP

Transmission Control Protocol / Internet Protocol

standards

allow hardware and software to interact across different manufacturers

what are the different protocols?

-TCP (Transmission Control Protocol)
-IP (Internet Protocol)
-HTTP (Hyper Text Transfer Protocol)
-FTP (File Transfer Protocol)

TCP

-how messages are broken up into packets and then reassembled
-detects errors and resends lost packets

-addresses packets -identifies location of a device on the internet and routes the individual packets from source to destination

HTTP

used for accessing and receiving web pages in the form of HTML files on the internet

FTP

used when transferring computer files between client and server

what are the email protocols?

-POP (Post Office Protocol) -IMAP (Internet Messaging Access Protocol) -SMTP (Simple Mail Transfer Protocol)

POP

-receives and holds emails -creates local copies of emails and deletes the originals

IMAP

-stores email messages on server -organises messages into folders -allows simultaneous access by multiple clients

SMTP

sending emails across the internet

differences between POP and IMAP

POP: -works best with one computer to check email -emails are downloaded and stored on computer you use -sent email is stored locally on your computer not on email server IMAP: -can use multiple computers / devices to check emails -emails stored on the server and device synchronises with server -sent email remains on the server so can be accessed from any device