Latest JN0-664 Study Guides 2023 – With Test Engine PDF [Q40-Q54] – IT Certification Exam Questions & Answers

NEW QUESTION 40
Exhibit

You are attempting to summarize routes from the 203.0.113.128/25 IP block on R8 to AS 64500. You implement the export policy shown in the exhibit and all routes from the routing table stop being advertised.
In this scenario, which two steps would you take to summarize the route in BGP? (Choose two.)

Remove the from protocol bgp command from the export policy.

Add the set protocols bgp family inet unicast add-path command to allow additional routes to the RIB tables. –

Add the set routing-options static route 203.0.113.123/25 discard command.

Replace exact in the export policy with orlonger.

NEW QUESTION 41
What is the correct order of packet flow through configurable components in the Junos OS CoS features?

Multifield Classifier -> Behavior Aggregate Classifier -> Input Policer -> Forwarding Policy Options -> Fabric Scheduler -> Output Policer -> Rewrite Marker -> Scheduler/Shaper/RED

Behavior Aggregate Classifier -> Multifield Classifier -> Input Policer -> Forwarding Policy Options -> Fabric Scheduler -> Output Policer -> Scheduler/Shaper/RED -> Rewrite Marker

Behavior Aggregate Classifier -> Input Policer -> Multifield Classifier -> Forwarding Policy Options -> Fabric Scheduler -> Output Policer -> Scheduler/Shaper/RED -> Rewrite Marker

Behavior Aggregate Classifier -> Multifield Classifier -> Input Policer -> Forwarding Policy Options -> Fabric Scheduler -> Scheduler/Shaper/RED -> Output Policer -> Rewrite Marker

NEW QUESTION 42
Exhibit

Based on the configuration contents shown in the exhibit, which statement is true?

Joins for group 224.7.7.7 are rejected if the source address is 192.168.100.10

Joins for any group are accepted if the group count value is less than 25.

Joins for group 224.7.7.7 are always rejected, regardless of the group count.

Joins for group 224.7.7.7 are accepted if the group count is less than 25

NEW QUESTION 43
A packet is received on an interface configured with transmission scheduling. One of the configured queues In this scenario, which two actions will be taken by default on a Junos device? (Choose two.)

The excess traffic will be discarded

The exceeding queue will be considered to have negative bandwidth credit.

The excess traffic will use bandwidth available from other queueses

The exceeding queue will be considered to have positive bandwidth credit

NEW QUESTION 44
Exhibit

The network shown in the exhibit is based on IS-IS
Which statement is correct in this scenario?

The NSEL byte for Area 0001 is 00.

The area address is two bytes.

The routers are using unnumbered interfaces

The system IDofR1_2 is 192.168.16.1

NEW QUESTION 45
After a recent power outage, your manager asks you to investigate ways to automatically reduce the impact caused by suboptimal routing in your OSPF and OSPFv3 network after devices reboot.
Which three configuration statements accomplish this task? (Choose three.)

set protocols ospf overload timeout 900

set protocols ospf3 realm ipv4-unicast overload timeout 900

set protocols ospf overload

set protocols oapf3 overload timeout 900

set protocols ospf3 overload

NEW QUESTION 46
You are responding to an RFP for a new MPLS VPN implementation. The solution must use LDP for signaling and support Layer 2 connectivity without using BGP The solution must be scalable and support multiple VPN connections over a single MPLS LSP The customer wants to maintain all routing for their Private network In this scenario, which solution do you propose?

circuit cross-connect

BGP Layer 2 VPN

LDP Layer 2 circuit

translational cross-connect

NEW QUESTION 47
Exhibit

CE-1 and CE-2 are part of a VPLS called Customer1 No connectivity exists between CE-1 and CE-2. In the process of troubleshooting, you notice PE-1 is not learning any routes for this VPLS from PE-2, and PE-2 is not learning any routes for this VPLS from PE-1.

The route target must match on PE-1 and PE-2.

The route distinguisher must match on PE-1 and PE-2.

The instance type should be changed to I2vpn.

The no-tunnel-services statement should be deleted on both PEs.

NEW QUESTION 48
Which two statements are correct about VPLS tunnels? (Choose two.)

LDP-signaled VPLS tunnels only support control bit 0.

LDP-signaled VPLS tunnels use auto-discovery to provision sites

BGP-signaled VPLS tunnels can use either RSVP or LDP between the PE routers.

BGP-signaled VPLS tunnels require manual provisioning of sites.

NEW QUESTION 49
Your organization manages a Layer 3 VPN for multiple customers To support advanced route than one BGP community on advertised VPN routes to remote PE routers.
Which routing-instance configuration parameter would support this requirement?

vrf-export

vrf-import

vrf-target export

vrf-target import

NEW QUESTION 50
Exhibit

You must ensure that the VPN backbone is preferred over the back door intra-area link as long as the VPN is available. Referring to the exhibit, which action will accomplish this task?

Configure an import routing policy on the CE routers that rejects OSPF routes learned on the backup intra-area link.

Enable OSPF traffic-engineering.

Configure the OSPF metric on the backup intra-area link that is higher than the L3VPN link.

Create an OSPF sham link between the PE routers.

NEW QUESTION 51
Exhibit

You have MAC addresses moving in your EVPN environment
Referring to the exhibit, which two statements are correct about the sequence number? (Choose two)

It identifies MAC addresses that should be discarded.

It resolves conflicting MAC address ownership claims.

It helps the local PE to identify the latest advertisement.

It is advertised using a Type 2 message

NEW QUESTION 52
Exhibit

You want Site 1 to access three VLANs that are located in Site 2 and Site 3 The customer-facing interface on the PE-1 router is configured for Ethernet-VLAN encapsulation.
What is the minimum number of L2VPN routing instances to be configured to accomplish this task?

1

3

2

6

NEW QUESTION 53
Exhibit

R1 and R8 are not receiving each other’s routes
Referring to the exhibit, what are three configuration commands that would solve this problem? (Choose three.)

Configure loops and advertise-peer-as on routers in AS 64497 and AS 64450.

Configure loops on routers in AS 65412 and advertise-peer-as on routers in AS 64498.

Configure as-override on advertisement from AS 64500 toward AS 64512.

Configure remove-private on advertisements from AS 64497 toward AS 64498

Configure remove-private on advertisements from AS 64500 toward AS 64499

NEW QUESTION 54
Exhibit

You want to implement the BGP Generalized TTL Security Mechanism (GTSM) on the network Which three statements are correct in this scenario? (Choose three)

You can implement BGP GTSM between R2, R3, and R4

BGP GTSM requires a firewall filter to discard packets with incorrect TTL.

You can implement BGP GTSM between R2 and R1.

BGP GTSM requires a TTL of 1 to be configured between neighbors.

BGP GTSM requires a TTL of 255 to be configured between neighbors.

Explanation
BGP GTSM is a technique that protects a BGP session by comparing the TTL value in the IP header of incoming BGP packets against a valid TTL range. If the TTL value is within the valid TTL range, the packet is accepted. If not, the packet is discarded. The valid TTL range is from 255 – the configured hop count + 1 to
255. When GTSM is configured, the BGP packets sent by the device have a TTL of 255. GTSM provides best protection for directly connected EBGP sessions, but not for multihop EBGP or IBGP sessions because the TTL of packets might be modified by intermediate devices.
In the exhibit, we can see that R2, R3, and R4 are in the same AS (AS 20) and R1 is in a different AS (AS 10).
Based on this information, we can infer the following statements:
* You can implement BGP GTSM between R2, R3, and R4. This is not correct because R2, R3, and R4 are IBGP peers and GTSM does not provide effective protection for IBGP sessions. The TTL of packets between IBGP peers might be changed by intermediate devices or routing protocols.
* BGP GTSM requires a firewall filter to discard packets with incorrect TTL. This is not correct because BGP GTSM does not require a firewall filter to discard packets with incorrect TTL. BGP GTSM uses TCP option 19 to negotiate GTSM capability between peers and uses TCP option 20 to carry the expected TTL value in each packet. The receiver checks the expected TTL value against the actual TTL value and discards packets with incorrect TTL values.
* You can implement BGP GTSM between R2 and R1. This is correct because R2 and R1 are EBGP peers and GTSM provides effective protection for directly connected EBGP sessions. The TTL of packets between directly connected EBGP peers is not changed by intermediate devices or routing protocols.
* BGP GTSM requires a TTL of 1 to be configured between neighbors. This is not correct because BGP GTSM requires a TTL of 255 to be configured between neighbors. The sender sets the TTL of packets to 255 and the receiver expects the TTL of packets to be 255 minus the configured hop count.
* BGP GTSM requires a TTL of 255 to be configured between neighbors. This is correct because BGP GTSM requires a TTL of 255 to be configured between neighbors. The sender sets the TTL of packets to 255 and the receiver expects the TTL of packets to be 255 minus the configured hop count.

IT Certification Exam Questions & Answers

Leave a Reply Cancel reply