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
-- Exhibit -Click the Exhibit button.
Referring to the exhibit, which type of LSA will be seen on router A for routes originating in Customer A's network?
A. Type 7 LSA
B. Type 2 LSA
C. Type 5 LSA
D. Type 1 LSA
Which multicast group is used for all PIM routers?
A. 224.0.0.22
B. 224.0.0.13
C. 224.0.0.1
D. 224.0.0.2
-- Exhibit -{master:0}[edit protocols dot1x]
user@switch# show
authenticator {
authentication-profile-name my-profile;
static {
00:21:cc:ba:c7:00/40 {
interface ge-0/0/12.0;
}
}
interface {
ge-0/0/12.0 {
supplicant multiple;
server-fail deny;
}
ge-1/0/14.0 {
reauthentication 120;
server-fail vlan-name local-only;
}
ge-1/0/15.0 {
supplicant multiple;
mac-radius {
restrict;
}
reauthentication 120;
server-fail vlan-name guest;
}
}
}
-- Exhibit -
Click the Exhibit button.
You just added a device on port ge-0/0/12 with the MAC address 00:21:cc:ba:c7:59. All access ports on this device are members of VLAN v20. The RADIUS server is currently not reachable.
Referring to the configuration shown in the exhibit, what happens to traffic sent from this device?
A. The traffic is denied.
B. The traffic is accepted and uses the guest VLAN.
C. The traffic is accepted and uses the local-only VLAN.
D. The traffic is accepted and uses the v20 VLAN.
You are troubleshooting an LLDP neighbor and cannot see the IP address of the neighboring EX Series switch.
What is causing the problem?
A. A VLAN interface must be configured under the [edit vlans] hierarchy.
B. IP addresses are not sent in any LLDP TLVs.
C. A management address must be configured under the [edit protocols lldp] hierarchy.
D. You must enable LLDP-MED.
An OSPF router is an ABR but not an ASBR.
Which three types of LSAs would you expect this router to generate? (Choose three.)
A. Type 1 LSA
B. Type 3 LSA
C. Type 4 LSA
D. Type 5 LSA
E. Type 6 LSA
-- Exhibit
-- Exhibit -Click the Exhibit button.
In the exhibit, Host2 is the only host currently joining group 231.1.1.1, but S1 is still flooding the traffic to all hosts on VLAN 100.
What feature can be configured on S1 to limit the multicast flooding of traffic to only interested hosts on VLAN 100?
A. Multicast scoping
B. IGMP snooping
C. Multicast VLAN registration
D. IGMP immediate leave
-- Exhibit -
user@router> show class-of-service scheduler-map two Scheduler map: two, Index: 56974
Scheduler: sch-best-effort, Forwarding class: best-effort, Index: 26057 Transmit ratE. 1 percent, Rate Limit:
exact, Buffer sizE. remainder, Buffer Limit: exact, Priority: low Excess Priority: unspecified
Drop profiles:
Loss priority Protocol Index Name
Low any 1
Medium low any 1
Medium high any 1
High any 1
Scheduler: sch-expedited-forwarding, Forwarding class:
expedited-forwarding, Index: 10026
Transmit ratE. 1 percent, Rate Limit: none, Buffer sizE. 1 percent, Buffer Limit: none, Priority: high Excess Priority: unspecified
Drop profiles:
Loss priority Protocol Index Name
Low any 1
Medium low any 1
Medium high any 1
High any 1
user@router> show interfaces ge-0/0/1 extensive | find "CoS Information" CoS information: Direction : Output CoS transmit queue Bandwidth Buffer Priority Limit % bps % usec 0 best-effort 1 10000000 r 0 low exact 1 expedited-forwarding 1 10000000 1 0 high none
Logical interface ge-0/0/1.823 (Index 74) (SNMP ifIndex 506) (Generation 139) Flags: SNMP-Traps 0x4000 VLAN-Tag [ 0x8100.823 ] Encapsulation: ENET2 Traffic statistics: Input bytes : 1820224529 Output bytes : 6505980 Input packets: 1436371 Output packets: 75905
(... output truncated ...)
user@router> show interfaces ge-0/0/1 extensive | find "Queue Counters" Queue counters: Queued packets Transmitted packets Dropped packets 0 best-effort 1343970 1343970 7105 1 expedited-fo 53987 53987 2 assured-forw 0 0 3 network-cont 0 0 Queue number: Mapped forwarding classes 0 best-effort 1 expedited-forwarding 2 assured-forwarding 3 network-control Active alarms : None Active defects : None (... output truncated ...) -- Exhibit -
Click the Exhibit button.
Based on the configuration in the exhibit, why are you seeing drops in the best-effort queue on the SRX Series platform?
A. The drop-profile fill level is set too low.
B. Packets are dropped by a firewall policy.
C. The best-effort queue is being shaped.
D. The scheduler is not being applied correctly.
You want to deploy MSTP with multiple regions. Each region should have a unique root bridge to accommodate a set of VLANs. Which three configuration elements must watch on switches participating in this deployment scenario? (Choose three)
A. MSTI toVLAN mapping
B. revision level
C. CST BPDU parameters
D. configuration name
E. bridge priority
You have been asked to implement 802.1X in your network and to ensure that all authorized users continue to be permitted should the RADIUS server fail. Which solution will satisfy this requirement?
A. Implement the persistent MAC feature with the override option.
B. Implement the server fail fallback feature with the override option.
C. Implement the persistent MAC feature with the use-cache option.
D. Implement the server fail fallback feature with the use-cache option.