JN0-643 Online Practice Questions and Answers
R1 and R2 are ASBRs in the same area, each with an equal cost external path to the same external network prefix. R1 advertises an external route into OSPF with a Type 1 metric. R2 advertises an external route into OSPF with a Type 2 metric.
Which route would be preferred?
A. R1's route is preferred because Type 1 metrics take into account the external cost only.
B. R1's route is preferred because Type 1 metrics take into account the internal and external cost.
C. R2's route is preferred because Type 2 metrics take into account the internal and external cost.
D. R2's route is preferred because Type 2 metrics take into account the external cost only.
-- Exhibit -user@router> show route protocol bgp detail
inet6.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden) 4444:4444::/32 (1 entry, 1 announced) *BGP PreferencE. 170/-101 Next hop typE. Router, Next hop index: Address: 0x934c688 Next-hop reference count: 2 SourcE. 172.27.0.5 Next hop: ::172.27.0.5 via ge-0/0/1.0, selected StatE. Local AS: 3 Peer AS: 701 AgE. 3:22 Task: BGP_701.172.27.0.5+52965 Announcement bits (1): 0-KRT AS path: 701 4 I Aggregator: 4 10.255.1.34 Accepted LocalpreF. 100 Router ID. 10.255.1.31
-- Exhibit -
Click the Exhibit button.
Referring to the exhibit, which two statements are true? (Choose two.)
A. The IPv6 route was learned from an IPv6 BGP neighbor.
B. The IPv6 route was learned from an IPv4 BGP neighbor.
C. The IPv6 destination will use IPv4 as the next hop.
D. The IPv6 destination will use IPv6 as the next hop.
Your company asks you to configure multicast routing on a Junos device. They tell you that the router at IP address 192.168.1.4 is the root of the shared multicast delivery tree.
Which command allows you to configure the Junos device as a non-RP router for PIM?
A. set protocols pim rp local family inet disable
B. set protocols pim rp local address 192.168.1.4
C. set protocols pim rp static address 192.168.1.4
D. set protocols pim rp auto-rp announce
You are asked to set up 802.1X port authentication for all access ports on your EX Series switch. You have a device that does not support 802.1X supplicants and you must ensure this device is authenticated. You must also ensure that no unnecessary delay occurs when authenticating this device.
Which statement is correct?
A. You should enable MAC RADIUS on the interface and use 802.1X multiple mode.
B. You should enable MAC RADIUS on the interface and statically add the MAC address to the 802.1x configuration.
C. You should enable MAC RADIUS on the interface and include the restrict parameter.
D. You should enable MAC RADIUS on the interface and include the disable parameter.
You must configure your access switch with more than 3000 VLANs and you want the ability to load- balance across them.
Which spanning-tree approach has the least impact on control-plane performance?
A. Configure your access switch with a load-balancing policy and apply it under [edit protocols rstp].
B. Configure your access switch for Rapid-PVST+.
C. Configure your access switch for MSTP, incorporating the use of MSTIs.
D. Configure your access switch for both VSTP and RSTP.
-- Exhibit
-- Exhibit -
Click the Exhibit button.
In the exhibit, customers connected to Area 3 must have access to external prefixes received from the data center connected to the router in Area 1. These configurations are currently applied to the routers in Area
1:
{master:0}[edit]
user@Area-1-ABR# show protocols ospf
no-nssa-abr;
area 0.0.0.1 {
nssa;
interface ge-1/1/1.100;
}
{master:0}[edit]
user@Area-1-External# show protocols ospf
area 0.0.0.1 {
stub no-summaries;
interface ge-1/1/1.100;
}
What must you change for these configurations to work?
A. Configure the ABR router in Area 1 to support a virtual link.
B. Delete no-summary-lsa from the ABR router in Area 1.
C. Configure the external router in Area 1 for NSSA.
D. Configure the ABR in Area 1 for a default LSA with a default-metric of 10 and no- summaries.
-- Exhibit
-- Exhibit -Click the Exhibit button.
In the topology shown in the exhibit, which two BGP attributes can AS1 manipulate to influence the path that AS4 takes to reach prefixes originated by AS1? (Choose two.)
A. Local Preference
B. AS Path
C. Origin
D. MED
-- 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.2
C. foo.inet.0
D. inet.8
Referring to the exhibit, what is the probability of the traffic being dropped if interface reaches 85% OF ITS bandwidth capacity?
A. 90%
B. 95%
C. 60%
D. 80%
Which two statements are correct about using LLDP on junos devices? (Choose two)
A. LLDP operates on layer 2 and layer 3 interfaces
B. LLDP can interoperate with the cisco discovery protocol CDP
C. LLDP is enabled on all devices by default
D. LLDP operates on layer 2 interfaces