Zusammenfassung der Ressource
Other Network Layer Features
- Domain Name System (DNS)
- Address Resolution Protocol (ARP)
- Method by which any host or router on a LAN can dynamically learn
the MAC address of another IP host or router on the same LAN
- “if this is your IP address, please reply with your MAC address.”
- Each time a host or router needs to send a packet
encapsulated in an Ethernet frame, it first checks its ARP
cache for the correct IP address and matching MAC address
- Hosts and routers will let
ARP cache entries time out to
clean up the table, so
occasional ARP Requests can
be seen.
- Ping
- Packet Internet Groper) uses the
Internet Control Message Protocol
(ICMP), sending a message called
an ICMP echo request to another IP
address.
- The computer with that IP address
should reply with an ICMP echo reply.