12.2.5 Addressing Method Facts

What are the two options for assigning IP addresses?

Static addressing and dynamic addressing (DHCP).

What is static addressing?

IP configuration information is manually configured on each host.

When is static addressing commonly used?

On networks with a very small number of hosts.

Why are printers, servers, and routers often assigned static IP addresses?

Because they must always have the same IP address.

What type of hosts may require static addressing?

Hosts that cannot accept an IP address from DHCP.

What is a major risk of static addressing?

It is very susceptible to configuration errors.

What common error can occur with static addressing?

Duplicate IP address configuration errors (two hosts assigned the same IP).

What capabilities does static addressing disable on a host?

APIPA and DHCP capabilities.

What does DHCP stand for?

Dynamic Host Configuration Protocol.

What is a DHCP server?

A special server configured to pass out IP addresses and other IP configuration information to network clients.

What size networks commonly use DHCP?

Small, medium, and large networks.

What happens when a client boots in a DHCP environment?

It contacts the DHCP server for IP configuration information.

How does a DHCP server know what addresses to assign?

It is configured with a range of IP addresses it can assign to hosts.

Besides IP addresses, what other information can DHCP provide?

Default gateway and DNS server addresses.

How does DHCP help prevent duplicate IP addresses?

The DHCP server ensures that each client has a unique IP address.

Can a DHCP server avoid assigning certain addresses?

Yes, it can be configured to not assign specific addresses in the range.

What is the assignment of an IP address by DHCP called?

A lease.

What does a DHCP lease include?

A lease time that identifies how long the client can use the IP address.

When does a client renew its DHCP lease?

At boot and at set intervals.

What type of traffic does the DHCP lease process use?

Frame-level broadcasts.

Why do DHCP requests usually not pass through routers?

Because DHCP uses broadcasts, which typically do not pass through routers to other subnets.

How can DHCP be enabled across subnets?

Enable BootP (DHCP broadcast) requests through the router.

What is another way to enable DHCP across subnets?

Configure a computer for BootP forwarding to request IP information for other clients.

What is BootP forwarding?

A system where a computer requests IP information on behalf of other clients.

What is a DHCP reservation?

A configuration where the DHCP server always delivers the same IP address to a specific host.

Why would you use a DHCP reservation?

To ensure a device gets the same IP address every time while still using DHCP.

Which method is better for large networks?

DHCP assignment.

Which method requires manual setup on every host?

Static addressing.

Which method automatically provides unique IP addresses?

DHCP assignment.

Which method is more prone to human error?

Static addressing.