Networks Flashcards
(16 cards)
What does Transmission Control Protocol (TCP) do?
Provides an error free transmission between two routers.
What does Internet Protocol (IP) do?
Routes packets across a wide area network (WAN).
What is TCP/IP?
The stack of protocols for the foundation of communication over the internet.
What does User Datagram Protocol (UDP) do? (4)
•Uses simple connectionless transmission model.
•It has no error checking.
•Sends short messages using datagrams, where speed is more important than accuracy.
•Maintains open two-way communications ideal for games.
What does Hypertext Transfer Protocol (HTTP) do?
A method for client servers to send and receive requests and deliver HTML web pages.
What does Hypertext Transfer Protocol Secure (HTTPS) do?
Is effectively the same as HTTP but it adds encryption and authentication.
What does File Transfer Protocol (FTP) do?
It sends files between computers, normally on a WAN.
What does Simple Mail Transfer Protocol (SMTP) do?
Transfers outgoing emails between servers. As well as email clients to servers.
What does Post Office Protocol (POP) do?
Retrieves emails from a mail server and transfers them to your device, removing them from the server in the process.
What does Internet Mail Access Protocol (IMAP) do?
Keeps emails on the mail server, maintaining synchronicity between devices.
What is the Application layer and what protocols are used?
•Network applications such as web browsers or email programs operate at this layer.
• FTP, HTTP, HTTPS, SMTP, IMAP
What is the Transport layer and what protocols are used?
• Sets up communication between two hosts - they agree settings such as language and packet sizes.
• TCP, UDP
What is the Internet layer and what protocol does it use?
• Addresses and packages data for transmission. Routes packets across the network.
• IP
What is the link layer (2) and how are they sent?
• Network hardware and connection port standards.
• Facilities the transmission of binary via any media.
• Copper, twisted pair, fibre, WiFi.
What are the 5 features of Packet Switching?
• No physical path
• Packets travel independently
• Does not reserve bandwidth
• No bandwidth wastage
• Supports store and forward transmission
What are the 5 features of Circuit Switching?
• Physical path between source and destination
• All packets use the same path
• Reserves bandwidth in advance
• Can cause a lot of bandwidth wastage
• No store and forward transmission
