Internet Protocol Analysis/Address Assignment/Quiz

A link-local address is an Internet Protocol address that is

.

Routers

packets with link-local addresses.

Link-local addresses for IPv4 are defined in the address block

.

Link-local addresses for IPv6 are defined with the prefix

.

Unlike

,

requires a link-local address to be assigned to every network interface on which the

protocol is enabled, even when one or more routable addresses are also assigned.

The IPv6 link-local address is required for sublayer operations of

.

The Bootstrap Protocol, or BOOTP, is a network protocol used by a network client to

.

The Dynamic Host Configuration Protocol (DHCP) is a more advanced protocol for the same purpose as

and has superseded the use of

. DHCP is an extension of

and uses the same datagram format.

Most DHCP servers also function as

servers.

The BOOTP protocol replaced

.

BOOTP, and therefore DHCP, supports the use of a relay agent, which

.

The Dynamic Host Configuration Protocol (DHCP) is a network protocol that is used to

.

DHCP servers maintain

.

Network links without a DHCP server can use

to receive messages from DHCP clients and forward them to DHCP servers.

DHCP servers typically grant IP addresses to clients only for

. DHCP clients are responsible for

, and must

.

By default, clients attempt to renew their lease using

traffic starting at one half of lease time, also known as

time (T1).

By default, clients attempt to renew their lease using

traffic starting at 87.5% of lease time, also known as

time (T2).

DHCP servers assign addresses through either

.

DHCPv4 operations fall into four basic phases:

. These points are often abbreviated as

.

DHCPv4 options provided to clients include

.

The base DHCP protocol does not include any mechanism for authentication. Because of this, it is vulnerable to a variety of attacks including

.

DHCPv6 operations are similar to DHCPv4, but are described as

. Renewals are processed with

.

DHCPv6-PD prefix delegation is used to

.

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