CCNP: BSI Chapter 4 Answer

1
In an IS-IS environment, what is true about Level 2 routers?
responsible for routing between separate domains
responsible for routing between different areas within the same domain*
responsible for routing between ISs within the same area
responsible for routing between ESs and ISs on the same subnet
2
Which two features make IS-IS more scalable than OSPF? (Choose two.)
one level of routers
fewer link-state LSAs are used
more routers can reside in a single area*
fewer link-state PDUs are used*
less timers to adjust
IS-IS does not form adjacencies
3
Which configuration specifies the IP networks to be advertised by IS-IS?
a network command for each IP network address
a router isis command for each IP network address
a clns router isis command for each interface with an IP network address that must be advertised
an ip router isis command for each interface with an IP network address that must be advertised*
an isis circuit-type command for each IP network address
4
Which of the following statements is true for IS-IS systems?
All ISs in an area must have different area addresses.
If multiple NETs are configured on the same IS, they must have different system IDs.
All ESs and Level 1 ISs must have a unique system ID area wide.*
All Level 3 ISs must have a unique system ID domain wide.
5
In IS-IS routing, when is level 2 routing required?
when routing between end systems and intermediate systems
when routing between level 1 areas in different domains
when routing between level 1 areas in the same domain*
when routing between end systems in the same area
6
What is used to elect the designated intermediate system if all interface priorities are the same on a Frame Relay network?
weight attribute
highest IP address
IP address of the loopback interface
MAC address
highest local DLCI*
7
Given the above output, which statement is true?
Rtr-B is a L1 router only.
Rtr-B is a L1/L2 router.*
Rtr-B is a L2 router only.
Rtr-B is a L3 router.
8
Which two are likely to be a cause for IS-IS neighbor relationships to be stuck in INIT state? (Choose two.)
physical layer up, but data-link layer is down
mismatched area configurations
mismatched authentication configurations*
mismatched MTU configuration*
data-link layer connectivity, but no IP connectivity
9
Observe the diagram. The administrator requires the IS-IS adjacencies to authenticate so that no unauthorized routers will create adjacencies. Which interface command is required for a router to authenticate with another directly connected router before allowing the adjacency to form?
area-passwordpassword
domain-password password
area # authentication password
isis passwordpassword*
10
Which command is required in IS-IS to specify that a router will act only as a backbone router?
RTC(config-if)# isis circuit-type layer-1
RTC(config-if)# isis circuit-type layer-2-only
RTC(config-router)# is-type level-1
RTC(config-router)# is-type level-2-only*
11
In IS-IS routing, which of the following items describe the network service access point? (Choose two.)
the location at which OSI network services are provided to the network layer
the location at which OSI network services are provided to the transport layer*
a conceptual point on the boundary between the transport and session layers
a conceptual point on the boundary between the network and transport layers*
a logical entity formed by a set of contiguous routers
a protocol that carries upper-layer data and error indications
12
Which three statements are true about IS-IS L2 routers? (Choose three.)
L2 routers have interfaces in multiple areas.
L2 routers have interfaces in a single area.*
L2 routers maintain a link-state database that contains only inter-area topology information.*
L2 routers are responsible for routing to end systems inside an area.
L2 routers make up the backbone of an IS-IS routing domain.*
13
What is the area number for the following IS-IS router configuration? RouterA(config)# router isis RouterA(config-router)# net 49.2385.A02C.025B.0001.00
49
49.2385*
49.2385.A02C
A02C.025B.0001
14
Which command enables IS-IS on a given interface?
network
router isis
isis network
ip router isis*
15
Refer to the exhibit showing a network diagram and partial configuration. Two neighboring IS-IS routers are unable to form an
adjacency. Which two statements identify configuration problems causing the adjacency problem? (Choose two.)
incorrect adjacency level specified on R1 serial 0 interface
IS-IS routing not properly enabled on R1
IS-IS routing not properly enabled on R2*
mismatched area configurations
mismatched authentication configurations*
ES-IS adjacency settings not configured properly
16
Which two commands must be issued to initially configure a network for IS-IS? (Choose two.)
net command*
isis circuit-type
ip router isis*
isis metric
isis password
17
What is specified by Level 3 routing?
routing between separate domains*
routing between different areas within the same domain
routing between ISs within the same area
routing between ESs and ISs on the same subnet
18
Observe the diagram. The IS-IS routers are not exchanging updates. What is a possible reason?
The routers are not in the same area.*
The metrics do not match.
The IS-IS circuit types do not match.
The IS-IS levels are not the same.
19
Which two statements are true about the IS-IS pseudonode LSP? (Choose two.)
It represents a LAN.*
It is sent by the DIS only.*
It is sent on point-to-point networks.
It is sent by L2 routers only.
It increases the number of adjacencies on a LAN.