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In computer networking, IP address spoofing or IP spoofing is the creation of Internet Protocol (IP) packets with a false source IP address, for the purpose of impersonating another computing system. [ 1 ]
Bogon filtering is the practice of blocking packets known as bogons, which are ones sent to a computer network claiming to originate from invalid or bogus IP addresses, known as bogon addresses. [ 1 ]
If this is the case, it generates an 11-bit hash of its own IP address and then XORs it with the previous hop. If it finds a non-zero hop count it inserts its IP hash, sets the hop count to zero and forwards the packet on. If a router decides not to mark the packet it merely increments the hop count in the overloaded fragment id field. [2]
A routing table usually consists of a list of possible destination networks or IP addresses for which the next hop is known. By only storing next-hop information, next-hop routing or next-hop forwarding reduces the size of routing tables. A given gateway only knows one step along the path, not the complete path to a destination. If no next hop ...
Another way of saying the next-hop must be reachable is that there must be an active route, already in the main routing table of the router, to the prefix in which the next-hop address is reachable. Next, for each neighbor, the BGP process applies various standard and implementation-dependent criteria to decide which routes conceptually should ...
The routing metric used by RIP counts the number of routers that need to be passed to reach a destination IP network. The hop count 0 denotes a network that is directly connected to the router. 16 hops denote a network that is unreachable, according to the RIP hop limit. [4]
The IP forwarding algorithm is a specific implementation of routing for IP networks. In order to achieve a successful transfer of data, the algorithm uses a routing table to select a next-hop router as the next destination for a datagram. The IP address of the selected router is known as the next-hop address. [1] The IP forwarding algorithm ...
The default route in Internet Protocol Version 4 (IPv4) is designated as the zero address, 0.0.0.0 / 0 in CIDR notation. [2] Similarly, in IPv6 , the default route is specified by :: / 0 . The subnet mask is specified as / 0 , which effectively specifies all networks and is the shortest match possible.