1.1 number systems Flashcards
What are the uses of the hexadecimal system?
Error codes
Mac address
IP address
HTML colour codes
Error code
- often shown as hexadecimal values.
- hexadecimal numbers refer to the memory location of the error
- usually automatically generated by the
computer
What does the MAC address stand for?
Media Access Control address
What is a MAC address
- A unique number that identifies the device connected to the network
- It does not change when u connect to the internet from different locations
- part of the network interface card (NIC) inside your device
How many bits is MAC address made up of?
48 bits in pair of 6
NN-NN-NN-DD-DD-DD 0r NN:NN:NN:DD:DD:DD
1- What does the NN-NN-NN in a MAC address identify
2- What does the DD-DD-DD in a MAC address identify
1- The identity number of the manufacturer
2- The device’s serial number
for example 00 – 1C – B3 – 4F – 25 – FE
What do IP address stand for
Internet protocol address
What is IP address
- Unique address given to Each device connected to a network is known as the Internet
Protocol (IP) address - IP address changes as the location of the network you’re connected to changes
( represents the unique location on which you are connected to the internet, BASICALLY the location of your device on the internet)
IPv4
- 32-bit number
- values are separated using decimal point
- written in denary or hexadecimal
IPv6
- is the improved version of ipv 4
- 128-bit number
- values are separated using colons
- represented by a hexadecimal number
What is the difference between an IPv4 and an IPv6
32 vs 128 bit number. IPv6 uses a colon instead of a decimal point
What does HTML colour codes stand for
Hyper text markup language colour codes
What is HTML
- It is a mark-up (NOT PROGRAMMING) language
- used when writing and developing web pages
- It uses tags<>
- Often represents colours of text on screen
