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IT:Computer Networking:Network Layer;IP address classes

Terms in this set (15)

IP addresses can be split into two sections. What are they?
The Network ID and the Host ID
What is the Address Class System?
A way of defining how the global IP address space is split up.
Class A, Class B, Class C, Class D, Class E
Class A: Left-most bit, Starting IP address, Last IP address?
0xxx, 0.0.0.0, 127.255.255.255
Class B: Left-most bit, Starting IP address, Last IP address?
10xx, 128.0.0.0, 191. 255.255.255
Class C: Left-most bit, Starting IP address, Last IP address?
110x, 192.0.0.0, 223.255.255.255
Class D: Left-most bit, Starting IP address, Last IP address?
1110, 224.0.0.0, 239.255.255.255
Class E: Left-most bit, Starting IP address, Last IP address?
1111, 240.0.0.0, 255.255.255.255
CIDR
Classless Inter-Domain Routing
Which layer are MAC addresses used?
the Data Link Layer
Which layer are IP addresses used?
the Network Layer
What protocol relates MAC addresses and IP addresses with each other?
ARP (Address Resolution Protocol)
ARP
Address Resolution Protocol. An Internet protocol used to map an IP address to a MAC address. Defined in RFC 826.
ARP table
A database of records that maps MAC addresses to IP addresses. The ARP table is stored on a computer's hard disk where it is used by the ARP utility to supply the MAC addresses of network nodes, given their IP addresses.
FF-FF-FF-FF-FF-FF
Broadcast MAC address.
The ethernet broadcast frame which will be sent to all devices within the same broadcast domain.
FF-FF-FF-FF-FF-FF (the ``all-Fs'' address) is used to broadcast a frame.
ARP Response
This is a response message to the ARP Broadcast. The response sends a message to the device sending the ARP Broadcast and it has information about the hardware address of a node with a certain IP address.
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