最新なJuniper JN0-643問題集（290題）、真実試験の問題を全部にカバー！

質問 1：
-- Exhibit --
user@router> show configuration routing-options
rib-groups {
foo {
import-rib [ inet.8 inet.2 inet.0 ];
}
}
user@router> show configuration protocols pim
rib-group inet foo;
interface all;
-- Exhibit --
Click the Exhibit button.
Based on the configuration in the exhibit, which routing table is used for IPv4 multicast RPF checks?
A. inet.0
B. inet.8
C. foo.inet.0
D. inet.2
正解：B

質問 2：
-- Exhibit --
{master:0}[edit]
user@router# show class-of-service
classifiers {
inet-precedence normal-traffic {
forwarding-class best-effort {
loss-priority low code-points [ my1 my2 ];
}
}
}
code-point-aliases {
inet-precedence {
my1 000;
my2 001;
cs1 010;
cs2 011;
cs3 100;
cs4 101;
cs5 111;
cs6 111;
}
}
-- Exhibit --
Click the Exhibit button.
In the exhibit, you see a configuration for CoS. Incoming traffic with specific IP precedence bits should be mapped to a forwarding class named best-effort. A classifier named normal- traffic is defined.
What must you add to complete this configuration?
A. Apply classifier normal traffic to the interface hierarchy under the class-of-service stanza.
B. Add code point values for the expedited-forwarding forwarding class as well as the best- effort forwarding class.
C. Configure a rewrite marker on the ingress Gigabit Ethernet interface.
D. Include the option q-pic-large-buffer under the chassis hierarchy to accommodate the new code points.
正解：A

質問 3：
-- Exhibit --
user@router# run show route receive-protocol bgp 192.168.4.101 detail
inet.0: 18 destinations, 20 routes (18 active, 0 holddown, 0 hidden)
* 10.16.1.0/24 (1 entry, 1 announced)
Accepted
Nexthop: 192.168.4.101
LocalpreF. 100
AS path: 123 111 I
* 10.16.2.0/24 (1 entry, 1 announced)
Accepted
Nexthop: 192.168.4.101
LocalpreF. 100
AS path: 123 222 312 I
* 10.16.3.0/24 (1 entry, 1 announced)
Accepted
Nexthop: 192.168.4.101
LocalpreF. 100
AS path: 123 231 222 I
* 10.16.4.0/24 (1 entry, 1 announced)
Accepted
Nexthop: 192.168.4.101
LocalpreF. 100
AS path: 123 333 111 I
-- Exhibit --
Click the Exhibit button.
Referring to the exhibit, which AS path regular expression will match only the 10.16.1.0/24 and 10.16.2.0/24 routes?
A. .(222|111) .*
B. .+ (222|111) .*
C. .* (222|111) .*
D. . (.222|.111) .*
正解：A

質問 4：
NetBIOS snooping information is stored in which database on EX Series switches?
A. LLDP neighbor database
B. routing table database
C. MAC table database
D. RADIUS database
正解：A

質問 5：
-- Exhibit -

-- Exhibit --
Click the Exhibit button.
In the exhibit, an EBGP session is currently established between R1 and R2. R2 changes its import policy to accept 10 of the routes it previously denied from R1.
Which BGP capability must be negotiated on the BGP session for R2 to install the routes accepted by the new policy?
A. outbound route filtering (ORF)
B. multiprotocol BGP (MBGP)
C. AddPath
D. route refresh
正解：D

質問 6：
-- Exhibit -

-- Exhibit --
Click the Exhibit button.
In the exhibit, R5 is receiving five 200.1.1.x routes from the RIP router, and is advertising them into Area 1 using an export policy. You want to summarize the RIP routes into Area 0 with the most specific prefix.
Which configuration will accomplish goal?
A. [edit protocols]
user@R1# show
ospf {
area 0.0.0.0 {
interface ge-0/0/1.0;
interface ge-0/0/2.0;
interface lo0.0;
}
area 0.0.0.1 {
nssa {
default-lsa type-7;
area-range 200.1.1.0/29;
}
interface ge-0/0/3.0;
}
}
B. [edit protocols]
user@R1# show
ospf {
area 0.0.0.0 {
interface ge-0/0/1.0;
interface ge-0/0/2.0;
interface lo0.0;
}
area 0.0.0.1 {
nssa {
default-lsa type-7;
area-range 200.1.1.0/28;
}
interface ge-0/0/3.0;
}
}
C. [edit protocols]
user@R1# show
ospf {
area 0.0.0.0 {
area-range 200.1.1.0/28;
interface ge-0/0/1.0;
interface ge-0/0/2.0;
interface lo0.0;
}
area 0.0.0.1 {
nssa {
default-lsa type-7;
}
interface ge-0/0/3.0;
}
}
D. [edit protocols]
user@R1# show
ospf {
area 0.0.0.0 {
area-range 200.1.1.0/29;
interface ge-0/0/1.0;
interface ge-0/0/2.0;
interface lo0.0;
}
area 0.0.0.1 {
nssa {
default-lsa type-7;
}
interface ge-0/0/3.0;
}
}
正解：A

質問 7：
-- Exhibit --
{master:0}[edit]
user@router# run show ospf interface vl-10.20.10.2 extensive
Interface State Area DR ID BDR ID Nbrs
vl-10.20.10.2 Down 0.0.0.0 0.0.0.0 0.0.0.0 0
TypE. Virtual, Address: 0.0.0.0, Mask: 0.0.0.0, MTU: 0, Cost: 1
Transit AreA. 0.0.0.1
Adj count: 0
Hello: 10, DeaD. 40, ReXmit: 5, Not Stub
Auth typE. None
Protection typE. None, No eligible backup
Topology default (ID 0) -> Down, Cost: 0
-- Exhibit --
Click the Exhibit button.
Your company is integrating another OSPF area into your existing OSPF infrastructure.
You created a virtual link that spans Area 2 and connects Area 3 to the backbone area.
Based on the exhibit, what is preventing the adjacency?
A. The wrong transit area is configured.
B. The backup route to Area 2 has not been configured.
C. The interface configured for the virtual link is incorrect. It should be a vt and not a vl interface.
D. No designated router (DR) has been elected.
正解：A

質問 8：
Which statement is true regarding OSPF multi-area adjacencies?
A. A type 3 (stub) link is advertised for a multi-area adjacency.
B. Configuring a multi-area adjacency allows the corresponding link to be considered an interarea link, so it will be less preferred over an intra-area link.
C. A DR and a BDR will be elected over the secondary interface, because it is not point-to- point.
D. One logical interface will be a primary link, and the other configured as a secondary link; the secondary link will be established as an unnumbered point-to-point interface.
正解：D

質問 9：
You are designing a new enterprise network using EX switches. You are asked to u management. In this scenario which two statements are correct? (Choose two)
A. PDU update timers are evaluated on a per interface basis
B. MVRP supports all spanning tree versions
C. Locally defined VLANS must be manually assigned to trunk ports
D. MVRP can only be enable on trunk ports
正解：A,D