Internet.2 Flashcards
What is protocol?
Set of rules governing data communication.
What are some examples of protocols?
HTTP - Internet
Internet Protocol - Internet
Ip Address - Internet Protocol Address
Does every computer have a IP address?
Yes.
What are Ipv4 addresses?
Four bit numbers separated by dots.
128-bit numbers represented in hex.
How does circuit switching networks work?
When you make a telephone call, a dedicated connection is set up between you and the person you are calling for the duration of the call – this is circuit switching. Although it works fine for phone calls, it isn’t big enough to handle billions of people sending data.
What is packet switching?
Packet Switching is the process of breaking up the overall file into a number of individual packets of the same size, the size of which is determined by the protocol being used.
What is a Header (Packet Switching)?
Part of packet, contains IP address of destination and IP address of the source, sequence number of packet, number of packets and error checking data.
What would you call a router to router?
Hop
Is there a difference in number of bytes with data packets?
No, all the same.
Do data packets all travel at same speed.
The packets may flow through the internet at different speeds.
What is the DNS made up of?
Domain names.
What is a domain name?
Name used to refer to an IP address.
What does the DNS server do?
Translates web address into an IP address.
Problems with IP addresses?
Hard to remember.
Have to change if you change server.
IP Adress change
If you use a laptop at home, its IP Address is the only one belonging to the router at home.
But if you take a laptop on holiday your laptop will be assigned to a new IP Address.
Many home IP addresses will change when the routers reconnects to the internet. This is known as a dynamic IP Address.
