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The ARP cache can be consulted with a shell:
Internet protocol (IP)
On an Ethernet segment, it is not necessary to use a material or software layer to fulfil the linking
functions. Level 2 protocols are used only on serial or parallel links, or on any other interface or
equipment without a MAC address (e.g. PPP or SLIP for IP access via a modem).
Each packet circulating on the network has several headers, because of consecutive encapsulations. A
packet of data thus has at least one header linked to the medium used (usually Ethernet). This is the
case for ARP. Packets using IP addresses will also have IP header information.
The contents of this fixed 20-byte header (this is a minimum, it can be more if IP options are used) give
information on the broadcasting station (IP address), the destination's address, the checksum, the
protocol, the version, etc.
There are 3 types of IP addresses:
•
•
•
Unicast for one particular station
Broadcast for all stations
Multicast for a (pre-defined) Multicast group
IP header
The Hackademy
DMP
-12/209-
SYSDREAM