ip nbar protocol discovery

IPv6 Neighbor Discovery Protocol NDP (Neighbor Discovery protocol, Neighbor Discovery Protocol) is a key protocol of IPv6. It combines ARP, ICMP Router

SSDP Service uses a notification message to notify the client of its existence, update the period information, and update the location information. SSDP: The alive message must set nt to its own service type, and the USN header to its own USN. SSDP: alive should include the location or Al header. If DNS is not supported, use the IP address of the SSDP Service to represent the location. SSDP: alive should also include the Cache control information, Ma

) below: Figure 1 Cisco Discovery Protocol Run the "show CDP neighbors" command to display the table of connected devices. Run "show CDP neighbors details" to expand the table and view the detailed connection information between vswitches (a VLAN matching error exists, right ?), And the detailed information of each device, including its management IP address i

CDP is short for Cisco Discovery Protocol, a data link layer Protocol. Through this Protocol, our network administrator can obtain information about devices that run the CDP Protocol adjacent to each other. CDP protocol version:

Cisco Discovery Protocol (CDP) from the name we can see that this is a Cisco proprietary, it is recommended that everyone learn CCNA when trying to be familiar with all the spelling do not simply write down the abbreviation!CDP can collect hardware and protocol information for neighboring devicesCDP has two global parameters that can be set CDP timer (CDP timer)

requests adopts the broadcast format and has its own IP address and MAC address, other hosts and routes will check their ARP cache at the same time. If they do not match, update your ARP cache. In this way, after several ARP requests, the ARP cache will be stable. If the device on the LAN changes, ARP repeats the above process. (In Linux, you can use$ ARPCommand to view the ARP process. ARP is only used for IPv4. IPv6 uses Neighbor

I. TCP/IP background and introductionIn the 70 's, with the development of computer technology, computers users realized that it was necessary to connect computers from all over the world to play a more important role in computer. But the simple connection is not enough, because the computer can not communicate. Therefore, the design of a common "language" to communicate is necessary to be less, then the TCP/IP