Mac (Media Access Control) Address; Packet; Ping; Rarp (Reverse Address Resolution Protocol) - ICP DAS USA PDS-220F Series User Manual

ГК Атлант Инжиниринг – официальный представитель в РФ и СНГ
+7(495)109-02-08 sales@bbrc.ru www.bbrc.ru

9. MAC (Media Access Control) address

To allow a computer to determine which packets are meant for it, each computer
attached to an Ethernet is assigned a 48-bit integer known as its MAC address (also
called an Ethernet address, hardware address or physical address). They are normally
written as eight hexadecimal numbers such as "00:71:88:af:12:3e:0f:01". Ethernet
hardware manufacturers purchase blocks of MAC addresses and assign them in
sequence as they manufacture the Ethernet interface hardware. Thus, no two
hardware interfaces have the same MAC address.

10. Packet

A packet is the unit of data sent across a physical network. It consists of a series of
bits containing data and control information, including the source and the destination
node (host) address, and is formatted for transmission from one node to another.

11. Ping

Ping sends an ICMP echo request message to a host, expecting an ICMP echo reply
to be returned. Normally, if a host cannot be pinged, you won't be able to use Telnet
or FTP to connect to the host. Conversely, if Telnet or FTP cannot be used to connect
to a host, Ping is often the starting point to determine what the problem is.

12. RARP (Reverse Address Resolution Protocol)

RARP provides a method of dynamically mapping 48-bit MAC address to the
corresponding 32-bit IP address.

13. Socket

Each TCP segment contains the source and destination port number that can be used
to identify the sending and receiving application. These two values, along with the
source and destination IP address in the IP header, uniquely identify each connection.
The combination of an IP address and a port number is called a socket.
PDS-220Fx Series User Manual (V1.2, Apr. 2015)
32-bit IP address
ARP RARP
48-bit MAC address
83