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What is meant by a 0.0.0.0 network address entry with a subnet mask if 0.0.0.0 in a pc's routing table?
Wiki User
∙ 13y ago
It means the computer is set to get an IP address from a server (called DHCP) and it didn't get one.
Wiki User
∙ 13y ago
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What is the characteristic of classful routing?
Classful routing protocols do not carry subnet mask information on their routing updates. This makes them unsuitable for hierarchical addressing that require Variable Length Subnet Mask (VLSM) and discontiguous network. Classless routing protocols do carry subnet mask information on their routing updates.RIP v1 and IGRP are classful routing protocols. RIP v2, EIGRP, OSPF, and BGP are classless routing protocol.When running a classful routing protocol on a network, make sure you use the same subnet mask everywhere. Otherwise, routing black holes can occur.Classless routing protocols extend the standard Class A, B, or C IP addressing scheme by using a subnet mask or mask length to indicate how routers must interpret an IP network ID. Classless routing protocols include the subnet mask along with the IP address when advertising routing information. Subnet masks representing the network ID are not restricted to those defined by the address classes, but can contain a variable number of high-order bits. Such subnet mask flexibility enables you to group several networks as a single entry in a routing table, significantly reducing routing overhead. Classless routing protocols includes RIP v2 and OSPF, Border Gateway Protocol version 4 (BGP4) and Intermediate System to Intermediate System (IS-IS).
Why is layer three addressing hierarchical?
Layer 3 addressing is hierarchical because it allows the division of networks into subnets. For example, one route entry can refer to a large general network and another can refer to a subnet of that same network. When forwarding a packet, the router will select the most specific route that it knows. However, if a specific subnet is not in the routing table but the larger network that holds the subnet is known, then the router will send it to the larger network, trusting that another router will find the subnet.
What Is Network Specific Routing?
Network Specific Routing is a technique in which there is only one entry for all the host connected to the network. Instead of having an entry for each and every hosted connected to the same physical network.
A router that uses the RIP routing protocol has an entry for a network in the routing table It then receives an update with another entry for the same destination network but with a lower hop count?
it will append the update information to the routing table
A router that uses the RIP routing protocol has an entry for a network in the routing table. It then receives an update with another entry for the same destination network but with a lower hop count.?
it will append the update information to the routing table
What pieces of information are contained in a routing table entry?
The metric value of the route The address of the logical destination network The type of learning method involved
What is the component of a routing table entry?
next hop address
When forwarding a route which route will router select?
First, routing is the process a router performs when making forwarding decisions for each packet arriving at the gateway interface. To forward a packet to a destination network, the router requires a route to that network. If a route to a destination network does not exist on the router, the packet will be forwarded to the default gateway. Now, the destination network can be a number of routers or hops away from the default gateway. If the router has an entry for the network in its routing table, it would only indicate the next-hop router to which the packet is to be forwarded to and not the exact route to the final router. To sum it up, the routing process uses a routing table to map the destination address to the next hop and then forwards the packet to the next-hop address.
When forwarding a packet which route will the packet select?
First, routing is the process a router performs when making forwarding decisions for each packet arriving at the gateway interface. To forward a packet to a destination network, the router requires a route to that network. If a route to a destination network does not exist on the router, the packet will be forwarded to the default gateway. Now, the destination network can be a number of routers or hops away from the default gateway. If the router has an entry for the network in its routing table, it would only indicate the next-hop router to which the packet is to be forwarded to and not the exact route to the final router. To sum it up, the routing process uses a routing table to map the destination address to the next hop and then forwards the packet to the next-hop address.
Which routing table entry will be used to forward this packet to the destination address?
172.16.16.0/20 [1/0] via 192.168.0.17
What is Difference between static and dynamic routing tables?
Technically, there is no such thing. The routing table has several entries (think of them as lines); the individual LINES in the routing table can be static or dynamic; and the routing table in its entirety can have both types. A static entry is programmed (hard-coded) by a network administrator. A dynamic entry is one which the router learns from a routing protocol, such as RIP, EIGRP, OSPF, BGP, etc. The routers "talk" to one another, and tell one another that they have routes to certain networks; the router that receives such updates will update its routing table as a result. Such entries are temporary, and expire after a relatively short time.
What is meant by a 0.0.0.0 network address entry?
It means your IP address has expired (if dynamic) or you released the adaptor manually (/release). On some older systems it can signal the failure of DHCP to get a dynamic address.
