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Get 31 Days Before Your CCENT Certification (Cisco Networking PDF

By Scott Bennett

ISBN-10: 1587132176

ISBN-13: 9781587132179

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Extra info for 31 Days Before Your CCENT Certification (Cisco Networking Academy Program)

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The ISP routers choose the best known path for the destination and forward the packet to other ISP routers. As mentioned previously, you can test connectivity and path selection to a destination with the ping and traceroute commands. A cloud in network diagrams often represents the numerous routers that choose the path for a packet. Other devices represented by the cloud include DSL Access Multiplexers (DSLAM) and Cable Modem Termination Systems (CMTS); this type of specialized equipment connects the user to the ISP.

Your IP address likely belongs to an ISP. The ISP received the address (or a block of addresses) from an Internet registry and assigned it to you. When your host sends packets, it places the assigned IP address in the packet header as the source address. The IP packet header also includes a destination address. If the destination IP address is outside of your ISP’s local network, the ISP’s routers forward it on a path to the outside network. The ISP routers choose the best known path for the destination and forward the packet to other ISP routers.

Servers can also allow an Internet Message Access Protocol (IMAP) client to receive and store messages and keep the messages in the mailbox on the server. IM servers Various, depending on vendor Users can install compatible IM clients and communicate instantly with other users on the same IM network. 1: Internet service providers (ISP) support many services and applications. These applications use UDP and/or TCP at the transport layer and IP at the network layer. ISP support personnel must be familiar with the TCP/IP protocols to best maintain reliable communication for users.

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


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