Chapter 6: Static Routing

0.0.0.0/0

A default static route is simply a static route with _____________ as the destination IPv4 address.

Manually Dynamically

A router can learn about remote networks in one of two ways:

Static Routing's primary use (1)

In Static Routing, providing ease of routing table maintenance in smaller networks that are not expected to grow significantly.

CIDR

It is a form of route summarization and is synonymous with the term supernetting.

VLSM

It is simply subnetting a subnet. It can be thought of as sub-subnetting.

Route summarization/Route aggregation

It is the process of advertising a contiguous set of addresses as a single address with a less-specific, shorter subnet mask

Both IPv4 and IPv6 support the configuration of static routes.

// remember

CIDR ignores the limitation of classful boundaries, and allows summarization with masks that are smaller than that of the default classful mask.

// remember

In VLSM, individual host addresses are assigned from the addresses of "sub-subnets".

// remember

Static Routes are often used to: > Connect to a specific network. > Provide a Gateway of Last Resort for a stub network. > Reduce the number of routes advertised by summarizing several contiguous networks as one static route. > Create a backup route in case a primary route link fails.

// remember

Three following route types: > Next-hop route - Only the next-hop IP address is specified. > Directly connected static route - Only the router exit interface is specified. > Fully specified static route - The next-hop IP address and exit interface are specified.

// remember

To reduce the number of routing table entries, multiple static routes can be summarized into a single static route if: > The destination networks are contiguous and can be summarized into a single network address. > The multiple static routes all use the same exit interface or next-hop IP address.

// remember

default

A _________ route identifies the gateway IP address to which the router sends all IP packets that it does not have a learned or static route.

default

A __________ static route is a route that matches all packets.

stub network

A ___________ is a network accessed by a single route, and the router has no other neighbors.

Manual

Remote networks are manually entered into the route table using static routes.

Dynamic

Remote routes are automatically learned using a dynamic routing protocol.

Static Routing's primary use (2)

Routing to and from stub networks.

not advertised

Static routes are ____________ over the network, resulting in better security.

specific

Static routes are useful when connecting to a _______ remote network.

less

Static routes use ____ bandwidth than dynamic routing protocols, no CPU cycles are used to calculate and communicate routes

primary route

The floating static route is only used when the ________________ is not available.

known

The path a static route uses to send data is _______.

Route summarization

This type of summarization helps reduce the number of entries in routing updates and lowers the number of entries in local routing tables.

higher administrative distance

To accomplish this, the floating static route is configured with a ______________ than the primary route.

single default route

Using a _____________ to represent a path to any network that does not have a more specific match with another route in the routing table.

Default routes

_________________ are used to send traffic to any destination beyond the next upstream router.

Floating static routes

______________________ are static routes that are used to provide a backup path to a primary static or dynamic route, in the event of a link failure.