31 Days Before Your CCENT Certification (Cisco Networking by Scott Bennett

By Scott Bennett

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In other words, routers divide broadcast domains. 3: On a LAN, hosts with a destination IP address can use ARP requests to find the MAC address of another host. The sending host then pairs the destination MAC and IP addresses in the headers of the outgoing transmission. On the other hand, when a host has a destination IP address that is not on the LAN, it has to use the destination MAC of the router as the default gateway to the remote network. If the router IP address is configured as the default gateway on the host, the sending host can use ARP to find the MAC address of the router.

HTTP also supports proxy services. You can set up a network device to receive all the HTTP requests on a network and act as a proxy to make the requests to the actual destination. A proxy server provides increased speed through caching, allows you to filter, and provides better security because your hosts do not directly identify themselves to the outside world. FTP is a two-part process. One part uses a protocol interpreter (PI) to send and receive control information, and the other part uses a data transfer process (DTP) to transfer the files.

4: When a host application intends to send a frame to all other hosts on a network, it sends a broadcast message. FFFF as the destination MAC address. A switch broadcasts this message to all hosts, and all hosts process the message. A network connected with switches and hubs is a single broadcast domain. 7: When an application intends to send information to another host, but it knows only the IP address of the destination, the sending host can use address resolution protocol (ARP). 28 31 Days Before Your CCENT Certification ARP is an IP protocol that finds a destination MAC when only the destination IP is known.

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