Chapter 6: 1.Refer to exhibit. What statement describes the DR/BDR relationship of the HQ router? a.HQ is the DR b.HQ is the BDR c.HQ is the DROTHER d.HQ is a member of an NBMA network

ginglyformweekΔίκτυα και Επικοινωνίες

29 Οκτ 2013 (πριν από 3 χρόνια και 7 μήνες)

225 εμφανίσεις

Chapter 6:


1.

Refer to exhibit. What statement describes the DR/BDR relationship of the
HQ router?

a.

HQ is the DR

b.

HQ is the BDR

c.

HQ is the DROTHER

d.

HQ is a member of an NBMA network


2.

Which two features are associated with Frame Relay OSPF point
-
to
-
multipoint
environments? (Choose two.)

a.

A DR is not elected

b.

The OSPF priority value determines the active DR on the Frame Relay
link

c.

OSPF neighbor routers are statically defined

d.

The link types are identified as broadcast multi
-
access

e.

The BDR will have a router ID whos
e value is greater than the DR
router ID


3.

Refer to the exhibit. How was the OSPF default gateway entry for R2
determined?

a.

Default routes are automatically injected by OSPF into all
advertisements

b.

A static default gateway route is defined in the configurati
on of R2

c.

The default
-
information originate command is applied on R1

d.

The ISP defines the gateway of last resort and automatically passes it
to R1 and R2

e.

The ip default
-
gateway command is applied on R2


4.

What is always required for OSPF routers to share routi
ng information?

a.

Designated routers

b.

A backup designated router

c.

Neighbor adjacencies

d.

An NBMA network topology

e.

Links that are configured on the 224.0.0.0 network


5.

Refer to the exhibit. A network administrator has implemented OSPF and the
network has
converged. If all router interfaces are enabled and functional,
what route will OSPF view as lowest cost when moving frames from Host3 to
Host1?

a.

R3 to R4 to R1

b.

R3 to R1

c.

R3 to R2 to R1

d.

R3 to R5 to R2 to R1



6.

Refer to the exhibit. Which commands configure ro
uter A for OSPF?

a.

Router ospf 1

Network 192.168.10.0

b.

Router ospf 1

Network 192.168.10.64 0.0.0.63 area 0

Network 192.168.10.192 0.0.0.3 area 0

c.

Router ospf 1

Network 192.168.10.64 255.255.255.192

Network 192.168.10.192 255.255.255.252

d.

Router ospf 1

e.

Network 1
92.168.10.0 area 0


7.

Refer to exhibit. Which network statement configures the home router to
allow all the interfaces to participate in OSPF?

a.

Network 10.0.0.0 0.3.255.255 area 0

b.

Network 10.8.0.0. 0.0.0.3 area 0

c.

Network 10.8.0.0 0.3.255.255 area 0

d.

Network
10.10.0.0 0.0.0.3 area 0

e.

Network 10.12.0.0 0.3.255.255 area 0


8.

Which statement is true regarding OSPF Dr and BDR selections?

a.

A new DR/BDR election occurs each time a new OSPF neighbor is
added

b.

The router with the highest OSPF priority setting wins the elec
tion for
DR

c.

The default priority value for a router connected to a multi
-
access
network is 0

d.

The router with the highest MAC address is elected as the DR when
the default priority values are used


9.

Refer to the exhibit. The network administrator would like
only the
172.16.32.0 network advertised to Router 1. Which OSPF network command
accomplishes this?

a.

Router2(config
-
router)# network 172.16.0.0 0.0.0.15 area 0

b.

Router2(config
-
router)# network 172.16.0.0 0.0.15.255 area 0

c.

Router 2(config
-
router)# network 172
.16.32.0 0.0.15.255 area 0

d.

Router2(config
-
router)# network 172.16.32.0 0.0.255.255 area 0


10.


Which two statements describe the operation of link
-
state routing
protocols? (Choose two)

a.

All routers in the same area have identical link
-
state databases when
conv
erged

b.

Routing loops are prevented by running the Diffusing Update
Algorithm (DUAL)

c.

Link
-
state routers send frequent periodic updates of the entire
routing table

d.

Reliable Transport Protocol (RTP) is used to deliver and receive LSAs

e.

Calculating the shortest

path for each destination is accomplished
with SPF algorithm


11.

Refer to the exhibit. Routers A, B, and C are part of the existing OSPF
network. Router D has been added to the network. All routers are running
OSPF and have the indicated priorities applied t
o the interface. What is the
DR/BDR status immediately after router D is added to the existing network?

a.

An election is forced and router D wins the DR election

b.

The DR and BDR do not change until the next election

c.

An election is forced and the existing BDR
becomes DR

d.

The router with the highest router ID becomes the new BDR


12.

Which two statements describe the use of OSPF DR/BDR elections? (Choose
two.)

a.

Elections are always optional

b.

Elections are required in all WAN networks

c.

Elections are required in point
-
to
-
point networks

d.

Elections are required in broadcast multi
-
access networks

e.

Elections are
sometimes required in NBMA networks


13.

Refer to the exhibit. As part of an OSPF network, R1 and R2 are trying to
become adjacent neighbors. Although it appears that the tw
o systems are
communicating, neither of the routing tables includes OSPF routes received
from its neighbor. What could be responsible for this situation?

a.

R1 and R2 are not on the same subnet

b.

The Process IDs on each router do not match

c.

The timer intervals o
n the routers do not match

d.

The value set for the Transmit Delay time on both routers is too low


14.

Refer to the exhibit. What is the purpose of the value 128 shown in bold?

a.

It is the OSPF cost metric

b.

It is the OSPF administrative distance

c.

It is the value ass
igned by the Dijkstra algorithm that designates the
distance in hops to the network

d.

It is the value assigned to an interface that is used by the DUAL
algorithm to determine the metric


15.

Refer to the exhibit. What is the purpose of the configuration commands

added on router B?

a.

Allows router A to form an adjacency with router B

b.

Provides a stable OSPF router ID on router B

c.

Provides a method of testing router traffic

d.

Creates the OSPF adjacency table on router B

16.

Refer to the exhibit. The command ip route 10.16.1
.64 255.255.255.252
s0/0/0 is entered into the router. Why does network 10.16.1.64/30 appear
in the routing table in addition to network 10.16.64/27?


a.

The router views 10.16.1.64/30 and 10.16.1.64/27 as two different
networks

b.

The static route is used as b
ackup route for packets destined for
10.16.1.64/27

c.

The AD for static routes is lower than the AD for OSPF routes

d.

The static route metric is lower than the OSPF metric for the
10.16.1.64/27 network


17.

What is the primary difference between link
-
state protocol
s and distance
vector protocols with regard to route calculation?

a.

Distance vector protocols take existing routes from their neighbors
and add to them. Link
-
state protocols independently calculate full
routes

b.

Link
-
state protocols calculate and pass full rou
ting tables to all
routers in their associated areas, and distance vector protocols do not

c.

When determining invalid routes, link
-
state protocols split horizon for
all route computations. Distance vector protocols use reverse
poisoning

d.

Distance vector proto
cols require more CPU and RAM for route
calculations than link
-
state protocols require


18.


What range of networks are advertised in the OSPF updates by the command
Router 1(config
-
router)# network 192.168.0.0
0.0.15.255 area 0?

a.

192.168.0.0/24 through 192.168
.0.15/24

b.

192.168.0.0/24 through 192.168..15.0/24

c.

192.168.15.0/24 through 192.168.31.0/24

d.

192.168.15.0/24 through 192.168.255.0/24

e.

192.168.16.0/24 through 192.168.255.0/24


19.


Refer to the exhibit. When establishing adjacency relationships, which IP
address would router A use to send hello packets to router B?

a.

10.11.0.1

b.

10.11.0.2

c.

10.11.0.255

d.

244.0.0.5

e.

255.255.255.255


20.


Refer to the exhibit. Which router will be elected the DR a
nd which will
become the BDR?

a.

R1 will be DR and R2 will be BDR

b.

R1 will be DR and R3 will be BDR

c.

R2 will be DR and R1 will be BDR

d.

R2 will be DR and R3 will be BDR

e.

R3 will be DR and R2 will be BDR

f.

R3 will be DR and R1 will be BDR


21.

When compared to a distance

vector routing protocol, what is a benefit of the
hierarchical design approach that is used in large OSPF networks?

a.

Simpler configuration

b.

Reduction of router processing requirements

c.

Isolation of network
instability


d.

Less complex network planning


22.

What are

two advantages of using link
-
state protocol instead of a distance
vector routing protocol?

a.

The topology database eliminates the need for a routing table.

b.

Frequent periodic updates are sent to minimize the number of
incorrect routes in the topological
database

c.

Routers have direct knowledge of all links in the network and how
they are connected

d.

After the initial LSA flooding, routers generally require less bandwidth
to communicate changes in a topology

e.

A link
-
state routing protocol requires less router p
rocessor power


23.

If a network has converged, what is true about the link
-
sate database held by
each router in the same OSPF area?

a.

Each router has a link
-
state database containing the same status
information

b.

Each router has a different link
-
state database de
pending on its
position within the network

c.

The link
-
state database is stored in a designated router and is
accessed by each router in the area as needed

d.

The link
-
state database in each router only contains information
about adjacent routers and the state o
f their links


24.

Refer to the exhibit. RTRC was recently configured and is not sending the
proper OSPF router RTRB, as show in the RTRB routing table. Based on the
RTRC configuration, what is most likely the problem?

a.

RTRC interfaces are administratively shut

down

b.

The OSPF process ID for RTRC does not match the process ID used on
RTRB

c.

The interface addresses on RTRC overlap with other addresses in the
network

d.

The OSPF routing configuration on RTRC has a missing or incorrect
network statement