IP Addressing Flashcards
At what OSI level is IP addressing used?
Network Layer (3)
What is the range of numbers available for ip address octets ?
0-255
What do the x’s represent in an ip address xxx.xx.xxx.yy ?
Network portion, similar to zip code for mail
What do the y’s represent in an ip address xxx.xx.xxx.yy ?
Host portion, similar to street address for mail
Network Address
Identifier for a group of devices (zip code without a street address) Network Prefix;
Broadcast Address
Identifier for all devices on a network; address that can send a message to all devices on a network (similar to writing “Resident” and a zip code on mail).
Host Address
Identifies unique device on a network
How does one identify a network address ?
Network addresses has all Binary 0’s in host portion (255.255.255.0)
How does one identify a broadcast address ?
Broadcast addresses have all Binary 1’s in the host portion. (0.0.0.255)
How does one identify a host address ?
Host address are anything except Network and Broadcast address (255.255.255.(1-254))
CIDR Notation example
IP address 203.0.113.10 Subnet mask 255.255.255.0 (11111111 11111111 11111111 00000000 = 24 1’s) Length of network prefix = /24. Converts to 203.0.113.10/24
Private IP address range
10.0.0.0 - 10.255.255.255 ; 172.16.0.0 - 172.31.255.255; 192.168.0.0-192.168.255.255 (must be used on home networks).
Loopback address
127.0.0.1 Addresses used for testing on your local system
When can 2 devices communicate
When they are on the same network. If they are not on the same network another device must be added. (Gateway / Router).
What is the purpose of a subnet mask.
Tells us where the network portion and the host portion of an ip address are; allows us to subdivide networks.
