Network Hardware & Internet Flashcards
What is the role of a switch
Connects devices in a LAN. Switches receive data from one device to and transmit the data to other devices on the network using the MAC address.
What is a NIC?
A network interface card allows devices(nodes) to connect to a network. And stored the devices MAC address.
What is the role of a router?
Routers are responsible for transferring data packets between networks and to use the IP address to determine the best route to transmit the data.
And can also connects devices to the internet.
What is the role of a WAP
Wireless access point broadcasts a wireless signal allowing devices to communicate with a network. E.g WiFi hotspots in school/shops etc
What is the internet?
A worldwide connection of networks. The internet is a WAN and is based around the protocol TCP/IP. The internet can acces the WWW which use protocols to view web pages.(a client server)
A website must be hosted on the web server for it to be accessed by others using the internet.
What is the role of DNS
Domain Name service - used to translate website names into IP addresses. Easy for humans to use instead of remembering IP.
What are the steps on how to display a web page?
1) domain name is typed into the address bar of a browser
2) the DNS gets sent a request for the IP address of the domain name
3) the DNS will check if it stores the IP address similar to the domain name. If it does the IP address is sent to the web browser
4) the browser then connects to the IP address of the server and accesses the site.
If the local DNS server does not hold the IP address then another request is sent to a DNS server at a higher level until the IP address is found. And then sent back to local DNS server for you to access your browser.
