I have learned network technology for a long time, but what is the difference between a Layer 3 switch and a router? Many people will still be confused. So what is the difference between them, we need to understand it carefully.
OpenFlow can be used to control and manage the switching module by the controller.
Types of OSPF packets
Hello: Used to establish and maintain neighbor relationships. It is sent once every 10 seconds and timed out after 30 seconds.
FTP (FileTransfer Protocol) is used to transfer files between a remote server and a local host, and is a general protocol for transferring files on an IP network.
Wi-Fi 6 and 5G technologies will play an increasingly important role in the future, but enterprises will still tend to use Wi Fi 6 to create internal connections.
The Cisco Dynamic Trunking Protocol DTP is all the protocols of Cisco in the VLAN group. It is mainly used to negotiate the trunking process and trunk encapsulation 802.1Q type on the link between two devices. DTP is cisco's proprietary protocol.
Today we will review and self-check the brief description of the EIGRP protocol DUAL dispersion update algorithm.
Problems caused by traditional VPN
1. Too many VPNs make maintenance difficult and take up more equipment performance
Use UDP packets
Both source and destination ports are UDP 646
R1#show mpls ldp discovery Verifies whether the other party's LDP hello is received
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