Types of firewall routes

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Routing is the basic element of data communication networks. It is the process of selecting paths on a network along which packets are sent from a source to a destination.
Routes are classified into the following types based on the destination address:
-Network segment route: The destination is a network segment. The subnet mask of an IPv4 destination address is less than 32 bits or the prefix length of an IPv6 destination address is less than 128 bits.
-Host route: The destination is a host. The subnet mask of an IPv4 destination address is 32 bits or the prefix length of an IPv6 destination address is 128 bits.
Routes are classified into the following types based on whether the destination is directly connected to a router:
-Direct route: The router is directly connected to the network where the destination is located.
-Indirect route: The router is indirectly connected to the network where the destination is located.
Routes are classified into the following types based on the destination address type:
-Unicast route: The destination address is a unicast address.
-Multicast route: The destination address is a multicast address.

Other related questions:
Route types in the routing table on the USG6000 series
Route types in the routing table on the USG6000 series include: protocol and destination address/mask.

Default routes of firewalls
Default routes are special routes. Generally, administrators can manually configure default static routes. Default routes can also be generated through dynamic routing protocols, such as OSPF and IS-IS. Default routes are described as follows: To put it in a simple way, default routes are used only when packets to be forwarded do not match any routing entry in a routing table. In a routing table, a default route is the route to network 0.0.0.0 (with the mask 0.0.0.0). You can run the display ip routing-table command to check whether a default route is configured. If the destination address of a packet does not match any entry in the routing table, the packet is sent through a default route. If no default route exists and the destination address of the packet does not match any entry in the routing table, the packet is discarded. An Internet Control Message Protocol (ICMP) packet is then sent, informing the originating host that the destination host or network is unreachable.

What is the firewall in TypeII?
In Typell, the firewall is the system of access control policies in a VPC. Based on the inbound and outbound rules associated with VPC, the firewall determines whether data packets are allowed to flow in or flow out of any associated VPC.

Route types in the routing table on the USG2000 and USG5000 series
Route types in the routing table on the USG2000 and USG5000 series include: protocol and destination address/mask.

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