igmp snooping

domain name systems maintain a large database that describes the ing between domain names and IP addresses, and the database is regularly updated. A translation request is usually sent from another computer on the network. It requires an IP address for route selection. Dynamic DDE data exchange DHCP Dynamic Host Configuration Protocol Encryption EGP external Gateway Protocol FDDI Optical Fiber Distributed Data Interface FAT file allocation table File Transfer Protocol (FTP) Filter Firmware Floo

forwarding. Adapt to multiple service applications A third requirement is the need for a multiple-business application. Here the so-called multiple services include several aspects: first, the support of the multicast business, the two-tier switch on the implementation of IGMP snooping function, three-tier switch should be implemented PIM-SM, PIM-DM, DVMRP and other three-tier multicast protocol at least

the switch, and the more MAC addresses are supported, the higher the rate of data forwarding. Typically, gigabit switches have a MAC address of up to 4k. such as the speed networks SP2404G offers a 4K;SP2400GW offer of 8k. Furthermore, function is the most direct indicator of the pros and cons of switching devices. For the general access layer or the small LAN needs of the team-level switches, simple QoS Assurance, security mechanisms, support network management strategy, spanning tree protoco

multicast addresses.Multicast session basics:After the receiver is up, the available multicast session stream is obtained.Methods for obtaining multicast session streams: email, RSS, and so on.IP/TV: Source + Directory Server + ReceiverThe receiver connects to the Directory Server through unicast to obtain the class table. Or listen to the program announcement to obtain the category table.IGMP: maintain the relationship between multicast group members and groups.V1, V2, and V3Different from bro

1. pseudo dhcp server. The working principle of Dhcp is probably that the client first broadcasts the dhcp discovery message. The dhcp server in this section returns the dhcp offer message, and the client sends the dhcp request message again to declare the IP address to be used, the server sends an ack to the client to inform the client that the ack can be used. To prevent pseudo dhcp, you can enable the dhcp snooping function on the vswitch. Any untr

complete routing protocol) it also supports ICMP, VRRP, and ARP. GSM7312 can be used as a BOOTP and DHCP client to manage the network through WEB, SNMP v1/v2c/v3, RMON, Telnet or Console, and other methods using the automatically obtained IP address. In addition, GSM7312 provides attractive modules such as password protection, switch configuration file upload and download, TFTP software upgrade, and complete system log files. The quality of service of the network is a matter of great concern to

. The layer-3 switching specification of GSM7312 supports IP routing at the wire speed, and supports Static Routing, default routing, RIP v1, RIP v2, and OSPF v2 of the complete routing protocol) it also supports ICMP, VRRP, and ARP. GSM7312 can be used as a BOOTP and DHCP client to use the automatically obtained IP address. You can manage networks through WEB, SNMP v1/v2c/v3, RMON, Telnet or Console, and other methods. In addition, GSM7312 provides attractive modules such as password protection

/100 Mpbs adaptive ports and 1 Gigabit expansion slot. You can purchase different types of Gigabit modules provided by youkang to achieve the function of connecting to a gigabit network. The UGS-7324RS has 15 Gbps non-blocking back-board bandwidth, in the layer-2 switch, the packet forwarding rate reaches the line speed value of Fast Ethernet; As a layer-3 switch, the packet forwarding rate reaches 6.6 Mpps, it provides a high-performance platform for enterprise networking. In full duplex mode,

services, the IGMP Snooping function should be implemented on the layer-2 switch, at least one layer-3 multicast protocols, such as PIM-SM, PIM-DM, and DVMRP, should be implemented on a layer-3 Switch. Currently, the most widely recognized and widely used protocol is PIM; second, users' security policy issues, including user identity authentication, user billing, and basic anti-attack policies. Currently,

imperative to upgrade Internet cafes to 1 GB. Features Common applications of Internet cafes include on-demand videos and games. They are supported through corresponding on-demand video-on-demand servers and game servers. When multiple users in the network use the video-on-demand service at the same time, they will have high bandwidth requirements. For LAN games, all their data is processed and forwarded within the LAN, the quality of data transmission within the LAN has a great impact on the s

Netyourlife.net DHCP snooping DHCP workflow: 1. The host sends a broadcast packet to the network to confirm whether a DHCP server exists and to confirm the IP address of the DHCP server. 2. Each DHCP server responds to the host and the corresponding packet contains the allocated information. 3. The host sends a request packet to the desired DHCP server. 4. The requesting DHCP server receives the request packet and replies to the ACK or Nak pac

nat set/show global configuration or display global Network Address Translation (NAT) settings. Routing ip nat add/delete/set/show interface add, delete, configure, or display the NAT settings of the specified interface. Routing ip nat add/delete addressrange add or delete an address range in the public address pool of the NAT interface. Routing ip nat add/delete addressmapping add or delete NAT address ing. Routing ip nat add/delete portmapping add or delete NAT port ing. Routing ip autodhcp s

parameters.The routing ip Autodhcp Set/show interface configures or displays the DHCP allocator settings for the specified interface.routing ip autodhcp add/delete exclusion Add or remove an exclusion range from the DHCP allocator address range.routing ip dnsproxy set/show global configures or displays the DNS proxy parameters globally.routing ip dnsproxy set/show interface Configure or display the DNS proxy parameters for the specified interface.routing ip

" communication between Host A and Host C is actually carried out indirectly through the Host where the hacker is located, that is, Host B acts as the "intermediary, information can be stolen and tampered. This attack method is called Man-In-The-Middle attack ". IP/MAC spoofing attacks Common spoofing types include MAC spoofing, IP spoofing, and IP/MAC spoofing. Hackers can forge the source address of a message to attack the attacker. Generally, the objective is to forge an identity or obtain pr

1. Prevention of Mac/cam attacks 　　 The principle and harm of 1.1mac/cam attack1.2 Typical viruses take advantage of mac/cam attack cases1.3 Using Port Security feature to protect against Mac/cam attacks1.4 Configuration1.5 using other techniques to prevent MAC/CAM attacks 　　 　　 2. Prevention of DHCP attacks 　　 2.1 Common issues with DHCP management:2.2DHCP Snooping Technology Overview2.3 Basic Precautions2.4 Advanced Precautions 　　 　　 3. ARP spoofi

distributor parameters. Routing ip autodhcp set/show interface configuration or display DHCP distributor settings for the specified interface. Routing ip autodhcp add/delete exclusion adds or deletes an exclusion range in the DHCP distributor address range. Routing ip dnsproxy set/show global configuration or display global DNS proxy parameters. Routing ip dnsproxy set/show interface configuration or display DNS proxy parameters of the specified interface. Routing ip

distributor parameters. Routing IP autodhcp set/show interface configuration or display DHCP distributor settings for the specified interface. Routing IP autodhcp Add/delete exclusion adds or deletes an exclusion range in the DHCP distributor address range. Routing IP dnsproxy set/show global configuration or display global DNS proxy parameters. Routing IP dnsproxy set/show interface configuration or display DNS proxy parameters of the specified interface. Routing ip

table of the route table manager.Routing ip nat set/show global configuration or display global Network Address Translation (NAT) settings.Routing ip nat add/delete/set/show interface add, delete, configure, or display the NAT settings of the specified interface.Routing ip nat add/delete addressrange add or delete an address range in the public address pool of the NAT interface.Routing ip nat add/delete addressmapping add or delete NAT address ing.Routing ip nat add/delete portmapping add or de

DNS proxy parameters of the specified interface.Routing ip igmp set/show global configuration or display IGMP global settings.Routing ip igmp add/delete/set/show interface add, delete, configure, or display IGMP on the specified interface.Routing ip igmp add/delete staticgr

display Global Network Address Translation (NAT) settings.Routing ip nat Add/delete/set/show interface add, delete, configure, or display the NAT settings of the specified interface.Routing ip nat Add/delete addressrange add or delete an address range in the public address pool of the NAT interface.Routing ip nat Add/delete addressmapping add or delete Nat address ing.Routing ip nat Add/delete portmapping add or delete Nat port ing. Routing IP autodhcp set/show global configuration or display t