What are differences between the default version of RIP, RIPv1, and RIPv2

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-Default version: The protocol stack can receive Routing Information Protocol (RIP) version 1 and RIP version 2 packets, but can send only RIP version 1 packets.

-Version 1: The protocol stack can send and receive only RIP version 1 packets.

-Version 2:

Other related questions:
What is the difference between IGMP versions of S series switches
IGMP runs on the last-hop router to collect users' requests for programs. The requested multicast data is then sent from the multicast source to users through PIM. IGMP has three versions. 1. IGMPv1 IGMPv1 defines the General Query message and Report message. A user sends Report message to request a program. After the last-hop router receives the Report message, it adds the user to the specified multicast group and sends General Query messages at intervals to maintain the membership of the user. If the router does not receive any Report message from the user within two intervals, it considers that the user does not require the multicast data and deletes the user from the multicast group. 2. IGMPv2 In IGMPv1, if a user does not require data of a multicast group, it leaves the multicast group after two intervals for sending General Query messages. Multicast data is still sent to the user in this period, wasting bandwidth. IGMPv2 improves IGMPv1 by adding two types of messages: Leave message and Special Query message. When a user does not require data of a multicast group, the user sends a Leave message to the last-hop router. When a port of the router receives the Leave message, the router sends some Group-Specific Query messages (the quantity is specified by the robustness variable) to the interface to check whether other users in the broadcast domain on the interface require data of the multicast group. If another user requires data of the multicast group, the user replies with a Report message. When receiving the Report message, the router retains the interface. If no Report message is received, the router deletes the interface from the multicast forwarding entry. IGMPv2 is the most widely used one on networks. 3. IGMPv3 IGMPv1 and IGMPv2 messages contain only the multicast group addresses of the requested programs. If multiple multicast sources provide data with the same multicast group address, data of all the groups is transmitted to users. Users may not see the programs they request. IGMPv3 solves this problem. IGMPv3 adds a source list in the Report message and supports the following six types of source lists: -Include: accepts data provided by the multicast sources in the list. -Exclude: rejects the multicast group data provided by all sources in the list. -ChangeToInclude: starts to accept multicast group data provided by the multicast sources in the list (previously rejects the data). -ChangeToExclude: starts to reject multicast group data provided by the multicast sources in the list (previously accepts the data). -AllowNew: adds a source of which the data is accepted or rejected. -BlockOld: deletes previous sources of which the data is accepted or rejected. IGMPv3 replaces the Leave message with the Rep ort message and adds the Group-and-Source-Specific Query message.

RIP versions supported by S series switches
Q: Which RIP versions are supported by S series switches? A: RIP has two versions including RIP-1 and RIP-2. You can specify RIP packet version on an interface. RIP-1 packets are transmitted in broadcast mode. RIP-2 packets can be broadcast or multicast. By default, RIP-2 packets are multicast using the IP address 224.0.0.9. Multicast mode prevents hosts that do not run RIP on the same network from receiving broadcast RIP packets, and prevents hosts running RIP-1 from receiving and processing routes with a subnet mask in RIP-2 packets. An interface can also receive RIP-1 packets when it uses RIP-2 broadcast mode. By default, an interface receives and sends RIP-1 packets. If RIP-2 is specified for an interface, the interface transmits packets in multicast mode by default.

Why the Configuration Is Displayed After the version 1 Command Is Used in the RIP View
Q: The default version of RIP is version 1. Why is there configuration information displayed after version 1 is configured in the rip view. A: The default version of RIP is version 1. By default, version 1 is not configured. In this case, the protocol stack can receive version 1 and version 2 packets but can send only version 1 packets. If version 1 is configured in the rip view, the protocol stack can receive and send only version 1 packets. The preceding describes differences of configured version 1 and default version 1. After version 1 is configured, the configuration information is displayed.

What is difference between upgrading the version file and upgrading the data file of the U1981?
The version file of U1900 is used to upgrade the software. The data file is used to upgrade the data.bin configuration file.

Differences between policy-based routing and default routing
The operation object of policy-based routing is packets. Even if a routing table is available, packets are not forwarded according to the routing table, and they are forwarded based on a policy according to requirements. According to the conventional routing and forwarding principle, packets are forwarded according to the destination addresses of the packets. Nowadays, more and more users expect that packets are forwarded and routed according to their defined policies on the basis of the conventional routing and forwarding. Policy-based routing enables the network administrator to formulate routing policies according to the source and destination addresses of packets, packet size, and link quality in order to change the forwarding paths of packets and meet user requirements.

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