70-216 - Moc 2153 - Dhcp

Front 1

Each time that a DHCP client starts, it requests an _ _ from a _ _.

Back 1

IP address
DHCP server

Front 2

When the DHCP server receives the request, it selects an _ _ from a range of _ defined in its database.

Back 2

IP address
addresses

Front 3

The DHCP server _ this address to the DHCP client.

Back 3

offers

Front 4

If the client accepts the offer, the DHCP server leases the IP address to the client for a specified _ _ _

Back 4

period of time.

Front 5

The default duration of an IP address lease is _ _.

Back 5

eight days

Front 6

DHCP uses a four-step process to lease IP addressing information to DCHP clients:

IP lease _
IP lease _
IP lease _
IP lease _

Back 6

request
offer
selection
acknowledgement

Front 7

The lease generation process begins when a client computer either _ _ or _ _ for the first time.

Back 7

starts up
initializes TCP/IP

Front 8

The lease process also begins when a client computer attempts to renew its lease and is _ (such as when a client computer is moved to another _).

Back 8

denied
subnet

Front 9

the client initializes a _ version of TCP/IP and broadcasts a _ message for IP addressing information.

Back 9

limited
DHCPDISCOVER

Front 10

The client does not yet have an IP address, so it uses _ as the source address.

Back 10

0.0.0.0

Front 11

because the client does not know the IP address of a DHCP server, it uses _ as the destination address.

Back 11

255.255.255.255

Front 12

The request message also contains the _ address

Back 12

media access control (MAC)

Front 13

The message also contains the client's _ _ so that DHCP servers can determine which _ sent the request.

Back 13

computer name
client

Front 14

All DHCP servers that have an IP address that is _ for the network segment to which the client is connected respond with a _ message

Back 14

valid

DHCPOFFER

Front 15

The DHCPOFFER message contains:

1) The client's _ _
2) An _ IP address
3) A subnet _
4) The _ of the _


5) A _ _, which is the IP address of the offering DHCP server

Back 15

hardware address
offered
mask
length lease
server identifier

Front 16

The DHCP client waits _ _ for an offer. If it does not receive an offer, it rebroadcasts the request four times at _ _ _ and _ second intervals, plus a random length of time between 0 and _ milliseconds.

Back 16

one second
2-, 4-, 8-, and 16-
1,000

Front 17

If the client does not receive an offer after _ requests, it uses an IP address in the reserved range from _ to 169.254._._

Back 17

_
169.254.0.1
255.254

Front 18

The DHCP client continues in an attempt to find a DHCP server every _ minutes.

Back 18

five

Front 19

The DHCP client responds to the first offer that it receives by broadcasting a _ message to accept the offer.

Back 19

DHCPREQUEST

Front 20

The DHCPREQUEST message includes the _ _ of the server whose offer it accepted.

Back 20

server identification

Front 21

All other DHCP servers then _ _ _

Back 21

retract their offers

Front 22

The DHCP server issuing the accepted offer broadcasts a _ _ message _ to acknowledge the successful lease.

Back 22

DHCP acknowledgement
(DHCPACK)

Front 23

When the DHCP client receives the acknowledgment, TCP/IP _ by using the _ _ that the DHCP server provides.

Back 23

initializes
configuration information

Front 24

A DHCP client automatically attempts to renew its lease when _ _ of the lease duration expires.

Back 24

50 percent

Front 25

To attempt a lease renewal, the DHCP client sends a _ _ _ to the DHCP server from which it obtained the lease.

Back 25

DHCPREQUEST message directly

Front 26

If the DHCP server is available, it _ the lease and sends the client a _ message with the new _ _

Back 26

renews
DHCPACK
lease duration

Front 27

If the DHCP server is unavailable, the client continues to use its _ _ _.

Back 27

current configuration parameters.

Front 28

If a DHCP client cannot renew its lease at the percent interval, the client continues to use its current configuration parameters. It then broadcasts a _ message to update its address lease when _ percent of the current lease duration expires.

Back 28

50
DHCPDISCOVER
87.5

Front 29

If a client requests an invalid or duplicate address for the network, a DHCP server can respond with a _ _ _ _.

Back 29

DHCP denial message (DHCPNAK).

Front 30

When the server responds with a DHCPNAK, This forces the client to _ _ _ _ and obtain a new, valid address.

Back 30

release its IP address

Front 31

All communication between a DHCP server and a DHCP client occurs using _ ports _ and _

Back 31

UDP
67
68

Front 32

If the lease expires, the client must immediately _ its use of the current IP address. The DHCP client then begins the _ _ _ in an attempt to lease a new IP address

Back 32

discontinue
DHCP lease process

Front 33

When you restart a DCHP client, it _ _ to _ the IP address lease that it had when it _ _

Back 33

automatically attempts
renew
shut down

Front 34

If the lease request is _, the client attempts to contact the _ _ _. If the _ _ responds and lease time is still available, the DHCP client uses the same _ _ until its next lease _ _.

Back 34

unsuccessful
configured default gateway
default gateway
IP address
renewal attempt

Front 35

If the DHCP client cannot renew the lease or contact the _ _, it stops using the _ _ _.

Back 35

default gateway
current IP address

Front 36

The client then uses an IP address in the reserved range from _ to _ and tries to contact a DHCP server every _ minutes

Back 36

169.254.0.1
169.254.255.254
five