How to use the arp command and what is the function of the arp a command?

arp -a MAC address that corresponds to the IP address of the current local connection. Just remember this. You can also use this command to detect ARP deception.

arp -a -b -s -g -p are all showing the same result, it's useless, you just have to remember -a.

RP displays and modifies the "Address Resolution Protocol."

arp)" cached items. arp

The cache contains one or more tables, which are used for storage.

IP addresses and their resolved Ethernet or Token Ring physical addresses. Each Ethernet or Token Ring network adapter installed on a computer has its own separate table. If used without parameters, then.

The arp command will display the help information.

Grammar. arp[-a

inetaddr]

nifaceaddr]]

ginetaddr]

nifaceaddr]]

dinetaddr

ifaceaddr]]

sinetaddr

etheraddr

ifaceaddr]] Parameter. a[

inetaddr]

nifaceaddr]

Displays the current for all interfaces.

ARP cache table. To show specific.

IP address.

arp cache items, please use the one with.

inetaddr

parameters. arp

a, here.

inetaddr represents. ip

Address. If not specified.

inetaddr, the first applicable interface is used. To display a specific interface.

arp cache table, please place.

nifaceaddr parameter. a

parameters are used here.

ifaceaddr

Represents the one assigned to the interface.

IP address. -n

Parameters are case-sensitive.

g[inetaddr]

nifaceaddr] with. a

Same. dinetaddr

ifaceaddr]

Deletes the specified.

IP address entry, here.

inetaddr represents. ip

Address. For the specified interface, to delete an item in the table, use.

ifaceaddr

parameters, here.

ifaceaddr

Represents the one assigned to the interface.

IP address. To delete all items, use an asterisk.

Wildcard instead.

inetaddr。

sinetaddr

etheraddr

ifaceaddr]. arp

Cache additions can be placed. IP address.

inetaddr

Parse to a physical address.

etheraddr

static items. You want to add static to the table for the specified interface.

ARP cache item, please use it.

ifaceaddr

parameters, here.

ifaceaddr

Represents the one assigned to the interface. IP address.

Show help at the command prompt.

Exegesis. inetaddr

And. ifaceaddr. ip

Addresses are represented by decimal notation with dots.

etheraddr

's physical address consists of six bytes that are represented by hexadecimal notation and separated by hyphens (e.g., 00-aa-00-4f-2a-9c).

The arp -a command is used to view the local arp table on the computer.

The MAC address of the ARP table, the source hall is the physical address of the network card, that is, ten machines can be connected to the route, not necessarily to each other, because it may not be in a working group, and the network will be displayed as long as the data is routed.

The address resolution protocol is based on the mutual trust of each host in the network, and the host on the LAN can send ARP reply messages independently, and when other hosts receive the reply packet, it will not detect the authenticity of the packet and will record it to the local ARP cache.

Built-in targets in the arp table:

arp table accept, drop, queue, returnAccept means to accept the packet, dorp means to drop the packet, queue means to transfer the packet to user space, return means to return to the previous chain, and then execute the next rule of which rule the previous chain jumped to.

The arp table has a default target for each split chain, and when the packet is not matched by all the rules, it is sent to at least one built-in table (filter table) on the side of the default target, and -t is often used to specify the table to be manipulated. The filter table has two built-in chains, in and out, where in is used to process packets destined for the local machine, and out for packets sent by the local machine.