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A router maintains an ARP (Address Resolution Protocol) table to map IP addresses to their corresponding MAC (Media Access Control) addresses within a local network. This mapping is essential for facilitating communication between devices on the same subnet, as packets need to be directed to the correct hardware address for proper delivery. By caching this information, the router can efficiently resolve addresses and reduce the need for repeated ARP requests, thereby improving network performance.
What else can I help you with?
What commands do you use to verify the ARP cache on a windows end-system and the ARP table ina Cisco router?
arp -a show arp
What command allows you to view entries in the ARP table of a Cisco router?
show ip arp
Which router component holds the routing table ARP cache and running configuration file?
SDRAM
What arp table entries are created when a client makes an arp request that cannot be satisfied by data already in the arp?
Dynamic ARP table entries are created whne a client makes an ARP request that cannot be satisfied by data already in the ARP table.
Are created when a client makes an ARP request that cannot be satisfied by data already in the ARP table?
Dynamic ARP table entries
Which of the following allows a router to respond t an ARP request that is intended for a remote host?
proxy ARP
What command is used to view the ARP table?
To view the ARP table, you can use the command arp -a in the command prompt on Windows or arp on Unix/Linux systems. This command displays the IP addresses and their corresponding MAC addresses that the device has recently communicated with. Additionally, on Linux, you can also use ip neigh to view the ARP table.
What happens to the ARP cache when a Cisco router is powered off?
Unless there are static ARP mappings, the cache will be cleared when powered off.
What mechanism does ARP use to resolve IP addresses?
ARP is a Third layer or Network layer protocol. ARP is an address resolution protocol . The mechanism used by ARP to resolve IP address is look up table.
ARP Poisoning?
Address Resolution Protocol (ARP) Poisoning (or ARP Cache Poisoning) modifies the IP address associated with the MAC address of a device. In layman’s terms, it means that a hacker can insert themselves between an endpoint and router (for example) and pretend to be the router to the endpoint and pretend to be the endpoint to the router. All data traffic that is meant to flow between endpoint and router will now pass through the hacker’s device.
What device will maintain a translation table with an entry for each internal host needing Internet access?
A router
What does the dynamic ARP table describe?
The dynamic ARP table tells you all the ARP (Address Resolution Protocol) that have been dynamically learned rather than statically. Dynamically means that it learned the pathway automatically without having to be configured.
