1.3 Computer Networks Retest

Star Topology Benefits

• Easy to add a new node / device

• Management of the network can be done centrally

• Fewer data collisions can occur

• If a node or device fails it does not affect the rest of the network.

What does the SMTP do?

• Sends emails

What does the IMAP do?

• Allows management of account

• Downloads a copy of an e-mail

What is a network protocol?

Defines rules for data transmission.

What is meant by a layer in regards to network protocol?

• Division of network functionality

Describe an advantage of using layers to construct network protocols?

• A layer can be taken out and edited without affecting other layers.

• … promotes interoperability between systems.

Relationship between the website URL, IP address and webserver (HTTP protocol)

• Website is hosted on a webserver

• Webserver has an IP address

• Browser sends URL to DNS

• URL has a linked IP

• DNS finds IP

• IP address sent back to computer

• Browser sends request to IP

• Webserver processes request for website and sends webpage