PASSHOT Latest Cisco CCIE/CCNP 350-401 Dumps Explained

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Detailed VRRP technology

In the VRRP standard protocol mode, only the Master router can forward packets, and the Backup router is in the listening state and cannot forward packets. Although the creation of multiple backup groups can achieve load sharing between multiple routers, the hosts in the LAN need to set up different gateways, which increases the complexity of the configuration. VRRP load balancing mode adds a load balancing function on the basis of the virtual gateway redundancy backup function provided by VRRP. Its realization principle is: Corresponding to a virtual IP address and multiple virtual MAC addresses, each router in the VRRP backup group corresponds to a virtual MAC address, so that each router can forward traffic.   In VRRP load balancing mode, you only need to create a backup group to achieve load sharing among multiple routers in the backup group, avoiding the problem of backup devices in the VRRP backup group being always idle and low network resource utilization. . The load balanc...
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What is the difference between MTU and PMTU?

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MTU (Maximum Transmission Unit) The maximum transmission unit is used to notify the other party of the maximum size of the data service unit that can be accepted, and to indicate the size of the payload that the sender can accept. Both Ethernet and 802.3 have a limit on the length of the data frame, and their maximum values  are 1500 bytes and 1492 bytes, respectively. This characteristic of the link layer is called MTU, which is the maximum transmission unit. Most types of networks have an upper limit on the length of several frames. If there is a datagram to be transmitted in the IP layer, and the length of the data frame is greater than the MTU of the link layer, then the IP layer needs to be fragmented (fragmentation), that is, the datagram is divided into dry slices, so that each slice is smaller than MTU. Different data links have different maximum transmission units (MTU). Since the IP protocol is the upper layer of the data link, it must be able to be used wi...
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SND/ONC Collection ccie sp 4.1 lab topology

1. Question: What is the difference between the SDN Cloud Campus Access Mode and the Kernel Mode? Answer: Access mode: Using a port security scheme, legitimate users form static ip+mac bindings on the port.      Gateway mode: Turns off dynamic arp learning capabilities and legitimate users adopt static arp bindings. 2. Question: Does the SDN need to change the IP address of the cluster IP before it can be authorized before it can be authorized? Answer: Needed 3. Question: Access control and under what circumstances will be on the pending list Answer: (1) First access      (2) IP conflict      (3) IP/VLAN inconsistencies      (4) IP changes      (5) Position change      (6) Gateway ARP spoofing 4. Question: Access control kernel mode and gateway device receives the ARP information of the unadmitted terminal, how to ...
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