Free JNCIP-SP JN0-664 Ultimate Study Guide (Updated 95 Questions) [Q32-Q55]

JN0-664 Juniper

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Free JNCIP-SP JN0-664 Ultimate Study Guide (Updated 95 Questions) [Q32-Q55]

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Free JNCIP-SP JN0-664 Ultimate Study Guide (Updated 95 Questions)

Get to the Top with JN0-664 Practice Exam Questions

QUESTION 32
You are a network architect for a service provider and want to offer Layer 2 services to your customers. You want to use EVPN for Layer 2 services in your existing MPLS network.
Which two statements are correct in this scenario? (Choose two.)

Segment routing must be configured on all PE routers.

EVPN uses Type 2 routes to advertise MAC address and IP address pairs learned using ARP snooping.

EVPN uses Type 3 routes to join a multicast tree to flood traffic.

VXLAN must be configured on all PE routers.

QUESTION 33

Click the Exhibit button.
You have an OSPF environment. You have recently added a router called R4 that is directly connected to R1 and R2. You discover that R4 is only peering with R2.
Referring to the exhibit, how would you correct the peering?

Adjust the Priority on R1 to be lower than the Priority on R4.

Change the MTU size on R1 and R2 to be 22 bytes higher than R4’s MTU size.

Adjust the Dead Interval on R4 to match the Dead Interval on R1 and R2.

Adjust the Hello Interval on R1 and R2 to match the Hello Interval on R4.

In OSPF, routers form adjacencies by exchanging Hello packets. These packets contain several parameters that must match between OSPF neighbors to establish a successful adjacency. Key among these parameters are the Hello Interval and the Dead Interval.
Let’s analyze the exhibit and the question to determine the correct course of action to ensure that R4 peers with both R1 and R2.
1. **OSPF Hello and Dead Intervals**:
– **Hello Interval**: The time in seconds between Hello packets sent out by a router. Default is usually 10 seconds for broadcast and point-to-point networks.
– **Dead Interval**: The time in seconds that a router will wait to receive a Hello packet from a neighbor before declaring the neighbor down. Default is usually four times the Hello Interval (40 seconds).
2. **Analysis of the Exhibit**:
– **R1’s Interface**: Shows a Dead Interval of 40 seconds.
– **R2’s Interface**: Shows a Dead Interval of 40 seconds.
– **R4’s Interface**: Shows a Dead Interval of 20 seconds.
From the exhibit, we can see that R4 has a Dead Interval of 20 seconds, while R1 and R2 have Dead Intervals of 40 seconds. This discrepancy prevents R4 from establishing an OSPF peering with R1.
3. **Option Analysis**:
– **A. Adjust the Priority on R1 to be lower than the Priority on R4**:
– Incorrect. The OSPF Priority is used for DR/BDR election on multi-access networks and does not impact peering issues.
– **B. Change the MTU size on R1 and R2 to be 22 bytes higher than R4’s MTU size**:
– Incorrect. While MTU mismatches can prevent OSPF adjacencies, the exhibit does not indicate an MTU mismatch issue.
– **C. Adjust the Dead Interval on R4 to match the Dead Interval on R1 and R2**:
– Correct. Matching the Dead Interval on R4 to 40 seconds will ensure that all routers have consistent Hello and Dead Intervals, allowing OSPF adjacencies to form.
– **D. Adjust the Hello Interval on R1 and R2 to match the Hello Interval on R4**:
– While this would be a valid approach if the Hello Intervals were mismatched, the exhibit shows that the Hello Intervals are consistent (10 seconds) across all routers. Therefore, this adjustment is not necessary.
**Conclusion**:
To correct the OSPF peering issue, the Dead Interval on R4 should be adjusted to match the Dead Intervals on R1 and R2. The correct answer is:
**C. Adjust the Dead Interval on R4 to match the Dead Interval on R1 and R2.**
**References**:
– Juniper Networks Documentation on OSPF: [OSPF
Overview](https://www.juniper.net/documentation/en_US/junos/topics/concept/ospf-routing-overview.html)
– OSPF Configuration Guide: [Configuring
OSPF](https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/ospf-configuring.html)

QUESTION 34
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 ospf3 realm ipv4-unicast overload timeout 900

set protocols ospf overload

set protocols ospf overload timeout 900

set protocols ospf3 overload

set protocols ospf3 overload timeout 900

QUESTION 35
Exhibit

R4 is directly connected to both RPs (R2 and R3) R4 is currently sending all ,o,ns upstream to R3 but you want all joins to go to R2 instead Referring to the exhibit, which configuration change will solve this issue?

Change the bootstrap priority on R2 to be higher than R3

Change the default route in inet.2 on R4 from R3 as the next hop to R2

Change the local address on R2 to be higher than R3.

Change the group-range to be more specific on R2 than R3.

QUESTION 36
Exhibit

CE-1 must advertise ten subnets to PE-1 using BGP Once CE-1 starts advertising the subnets to PE-1, the BGP peering state changes to Active.
Referring to the CLI output shown in the exhibit, which statement is correct?

CE-1 is advertising its entire routing table.

CE-1 is configured with an incorrect peer AS

The prefix limit has been reached on PE-1

CE-1 is unreachable

Explanation
The problem in this scenario is that CE-1 is configured with an incorrect peer AS number for its BGP session with PE-1. The CLI output shows that CE-1 is using AS 65531 as its local AS number and AS 65530 as its peer AS number. However, PE-1 is using AS 65530 as its local AS number and AS 65531 as its peer AS number. This causes a mismatch in the BGP OPEN messages and prevents the BGP session from being established. To solve this problem, CE-1 should configure its peer AS number as 65530 under [edit protocols bgp group external] hierarchy level.

QUESTION 37
A router running IS-IS is configured with an ISO address of 49.0001.00a0.c96b.c490.00.
Which part of this address is the system ID?

00a0.c96b.c490 is the system identifier.

0001.00a0.c96b.c490 is the system identifier.

c96b.c490 is the system identifier.

c490 is the system identifier.

In IS-IS (Intermediate System to Intermediate System) routing, each router is identified by a unique ISO (International Organization for Standardization) address, also known as a Network Entity Title (NET). The NET consists of three parts:
1. **Area Identifier**: Indicates the area to which the router belongs.
2. **System Identifier**: Uniquely identifies the router within the area.
3. **NSAP Selector (NSEL)**: Typically set to 00 for a router, indicating the Network Service Access Point.
The format of the ISO address is `49.XXXX.YYYY.YYYY.ZZZZ.ZZZZ.00`, where:
– `49` is the AFI (Authority and Format Identifier) indicating a private address.
– `XXXX` is the Area Identifier.
– `YYYY.YYYY.YYYY` is the System Identifier.
– `ZZZZ.ZZZZ` is the NSAP Selector.
Given the address `49.0001.00a0.c96b.c490.00`:
– **Area Identifier**: `49.0001`
– **System Identifier**: `00a0.c96b.c490`
– **NSAP Selector**: `00`
**Explanation**:
– **A. 00a0.c96b.c490 is the system identifier**:
– Correct. The System Identifier in an ISO address is a 48-bit (6-byte) field used to uniquely identify the router. In this address, `00a0.c96b.c490` is the correct 6-byte System Identifier.
– **B. 0001.00a0.c96b.c490 is the system identifier**:
– Incorrect. This includes the Area Identifier as part of the System Identifier, which is not correct.
– **C. c96b.c490 is the system identifier**:
– Incorrect. This is only part of the System Identifier. The full System Identifier must be 6 bytes long.
– **D. c490 is the system identifier**:
– Incorrect. This is an incomplete and incorrect part of the System Identifier.
**Conclusion**:
The correct part of the address that represents the System Identifier is:
**A. 00a0.c96b.c490 is the system identifier.**
**References**:
– Juniper Networks Documentation on IS-IS: [IS-IS
Configuration](https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/isis-configuring.h
– ISO/IEC 10589, the IS-IS routing protocol standard.

QUESTION 38
In IS-IS. which two statements are correct about the designated intermediate system (DIS) on a multi-access network segment? (Choose two.)

On the multi-access network, each router forms an adjacency to every other router on the segment.

On the multi-access network, each router only forms an adjacency to the DIS.

A router with a priority of 1 wins the DIS election over a router with a priority of 10.

A router with a priority of 10 wins the DIS election over a router with a priority of 1.

QUESTION 39
You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network. In this scenario, which statement is correct?

You must assign a unique site number to each attached site’s configuration.

This type of VPN only supports Ethernet interfaces when connecting to CE devices.

This type of VPN requires the support of the inet-vpn NLRI on all core BGP devices

You must use the same route-distinguiaher value on both PE devices.

Explanation
BGP signaled Layer 2 VPN is a type of VPN that uses BGP to distribute VPN labels and information for Layer 2 connectivity between sites over an MPLS network. BGP signaled Layer 2 VPN requires the support of the l2vpn NLRI on all core BGP devices . The l2vpn NLRI is a new address family that carries Layer 2 VPN information such as the VPN identifier, the attachment circuit identifier, and the route distinguisher. The l2vpn NLRI is used for both auto-discovery and signaling of Layer 2 VPNs . In this scenario, we are configuring a BGP signaled Layer 2 VPN across an MPLS enabled core network. Therefore, we need to ensure that all core BGP devices support the l2vpn NLRI.
References: 1:
https://www.juniper.net/documentation/us/en/software/junos/vpn-l2/topics/concept/vpn-layer-2-overview.html
2:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_l2_vpns/configuration/xe-16/mp-l2-vpns-xe-16-book/vpl

QUESTION 40
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

Explanation
The sequence number is a field in the MAC mobility extended community that is used to resolve conflicting MAC address ownership claims and to help the local PE to identify the latest advertisement. The sequence number is incremented by one for every MAC address mobility event, such as when a host moves from one Ethernet segment to another segment in the EVPN network. The PE device that receives multiple MAC advertisements for the same MAC address chooses the one with the highest sequence number as the most recent and valid advertisement.

QUESTION 41
Which two statements are correct about IS-IS interfaces? (Choose two.)

If a point-to-point interface is in both L1 and L2, separate hello messages are sent for each level.

If a point-to-point interface is in both 11 and L2, one combined hello message is sent for both levels.

If a broadcast interface is in both L1 and L2, separate hello messages are sent for each level.

If a broadcast interface is in both L1 and L2, one combined hello message is sent for both levels.

QUESTION 42
Which two statements are correct about reflecting inet-vpn unicast prefixes in BGP route reflection? (Choose two.)

Route reflectors do not change any existing BGP attributes by default when advertising routes.

A BGP peer does not require any configuration changes to become a route reflector client.

Clients add their originator ID when advertising routes to their route reflector

Route reflectors add their cluster ID to the AS path when readvertising client routes.

Route reflection is a BGP feature that allows a router to reflect routes learned from one IBGP peer to another IBGP peer, without requiring a full-mesh IBGP topology. Route reflectors do not change any existing BGP attributes by default when advertising routes, unless explicitly configured to do so. A BGP peer does not require any configuration changes to become a route reflector client, only the route reflector needs to be configured with the client parameter under [edit protocols bgp group group-name neighbor neighbor-address] hierarchy level.

QUESTION 43
Exhibit

You are asked to exchange routes between R1 and R4 as shown in the exhibit. These two routers use the same AS number Which two steps will accomplish this task? (Choose two.)

Configure the BGP group with the advertise-peer-as parameter on R1 and R4.

Configure the BGP group with the as-override parameter on R2 and R3

Configure the BGP group with the advertise-peer-as parameter on R2 and R3.

Configure the BGP group with the as-override parameter on R1 and R4

QUESTION 44
Exhibit

R2 is receiving the same route from R1 and R3. You must ensure that you can load balance traffic for that route.
Referring to the exhibit, which configuration change will allow load balancing?

Configure the multipath parameter under the global BGP configuration.

Apply the prepend policy as an import policy under group R1.

Configure the multipath multiple-as parameter under the global BGP configuration.

Apply the prepend policy as an import policy under group R3.

QUESTION 45
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.

Explanation
To summarize routes from the 203.0.113.128/25 IP block on R8 to AS 64500, you need to do the following:
* Add the set routing-options static route 203.0.113.128/25 discard command. This creates a static route for the summary prefix and discards any traffic destined to it. This is necessary because BGP can only advertise routes that are present in the routing table.
* Replace exact in the export policy with orlonger. This allows R8 to match and advertise any route that is equal or more specific than the summary prefix. The exact term only matches routes that are exactly equal to the summary prefix, which is not present in the routing table.

QUESTION 46
Referring to the exhibit. PE-1 and PE-2 are getting route updates for VPN-B when neither of them service that VPN.
Which two actions would optimize this process? (Choose two.)

Configure the resolution rib bgp.l3vpn.0 resolution-ribs inet.0 statement on the PEs.

Configure the family route-target statement on the RR.

Configure the resolution rib bgp.l3vpn.0 resolution-ribs inet.0 statement on the RR.

Configure the family route-target statement on the PEs.

BGP route target filtering can be configured on PE devices or on route reflectors (RRs).
Configuring BGP route target filtering on RRs is more efficient and scalable, as it reduces the number of BGP sessions and updates between PE devices. To configure BGP route target filtering on RRs, the following steps are required:
Configure the family route-target statement under the BGP group or neighbor configuration on the RRs. This enables the exchange of the route-target address family between the RRs and their clients (PE devices). Configure the resolution rib bgp.l3vpn.0 resolution-ribs inet.0 statement under the routing-options configuration on the RRs. This enables the RRs to resolve next hops for VPN routes using the inet.0 routing table.

QUESTION 47
You are configuring a Layer 3 VPN between two sites. You are configuring the vrf-target target:
65100:100 statement in your routing instance.
In this scenario, which two statements describe the vrf-target configuration? (Choose two.)

This value is used to identify BGP routes learned from the local CE device.

This value is used to add a target community to BGP routes advertised to the remote PE device.

This value is used to identify BGP routes learned from the remote PE device.

This value is used to add a target community to BGP routes advertised to the local CE device.

QUESTION 48
Referring to the exhibit, the PE-to-CE protocol being used is OSPF for the L3VPN. Also, there is an OSPF neighborship between CE-1 and CE-2.
Which statement is correct in this situation?

You must set a high metric on the CE-1 to PE-1 link for hosts at Site-1 to use the CE-1 to CE-2 link to reach hosts at Site-2.

You must set a high metric on the CE-1 to CE-2 link for hosts at Site-1 to use the L3VPN to reach hosts at Site-2.

Hosts at Site-1 will reach hosts at Site-2 through the CE-1 and CE-2 link by default.

Hosts at Site-1 will reach hosts at Site-2 through the L3VPN by default.

QUESTION 49
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

IS-IS is an interior gateway protocol that uses link-state routing to exchange routing information among routers within a single autonomous system. IS-IS uses two types of addresses to identify routers and areas:
system ID and area address. The system ID is a unique identifier for each router in an IS-IS domain. The system ID is 6 octets long and can be derived from the MAC address or manually configured. The area address is a variable-length identifier for each area in an IS-IS domain. The area address can be 1 to 13 octets long and is composed of high-order octets of the address. An IS-IS instance may be assigned multiple area addresses, which are considered synonymous. Multiple synonymous area addresses are useful when merging or splitting areas in the domain1. In this question, we have a network based on IS-IS with four routers (R1_1, R1_2, R2_1, and R2_2) belonging to area 0001. The area address for area 0001 is 49.0001. The NSEL byte for area 0001 is the last octet of the address, which is 01. The NSEL byte stands for Network Service Access Point Selector (NSAP Selector) and indicates the type of service requested from the network layer2. Therefore, the correct statement in this scenario is that the NSEL byte for area 0001 is 01.
References: 1:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_isis/configuration/xe-16/irs-xe-16-book/irs-ovrvw-cf.
2:
https://www.juniper.net/documentation/us/en/software/junos/is-is/topics/concept/is-is-routing-overview.html

QUESTION 50
You are configuring a BGP signaled Layer 2 VPN across your MPLS enabled core network.
In this scenario, which statement is correct?

You must use the same route-distinguisher value on both PE devices.

You must assign a unique site number to each attached site’s configuration.

This type of VPN only supports Ethernet interfaces when connecting to CE devices.

This type of VPN requires the support of the inet-vpn NLRI on all core BGP devices.

QUESTION 51
By default, which statement is correct about OSPF summary LSAs?

All Type 2 and Type 7 LSAs will be summanzed into a single Type 5 LSA

The area-range command must be installed on all routers.

Type 3 LSAs are advertised for routes in Type 1 LSAs.

The metric associated with a summary route will be equal to the lowest metric associated with an individual contributing route

Explanation
OSPF uses different types of LSAs to describe different aspects of the network topology. Type 1 LSAs are also known as router LSAs, and they describe the links and interfaces of a router within an area. Type 3 LSAs are also known as summary LSAs, and they describe routes to networks outside an area but within the same autonomous system (AS). By default, OSPF will summarize routes from Type 1 LSAs into Type 3 LSAs when advertising them across area boundaries .

QUESTION 52

Click the Exhibit button.
You are troubleshooting an issue for a customer site that uses 10.10.0.0/24 in AS 65224, but you see another AS in the AS path.
Referring to the exhibit, what is the cause of the problem?

AS 65000 is pre-pending AS 65137 to route advertisements.

The local AS is receiving two equal cost routes to 10.10.0.0/24.

The local AS is in the process of withdrawing the route from AS 65137.

AS 65137 is advertising the 10.10.0.0/24 prefix.

In the given exhibit, you are observing the BGP routing information for the prefix 10.10.0.0/24. The AS path for this prefix shows `65000 {65137 65224}`. To understand the issue, let’s analyze each aspect of the information provided and the options given:
1. **AS Path Analysis**:
– The AS path attribute in BGP is a list of AS numbers that a route advertisement has traversed.
– In this case, the AS path `65000 {65137 65224}` indicates that the route to 10.10.0.0/24 has been advertised through AS 65000, which includes AS 65137 and AS 65224.
2. **Understanding AS Path Prepending**:
– AS path prepending is a technique used by AS administrators to artificially lengthen the AS path.
– By adding their own AS number multiple times into the AS path, they make a route less attractive to others.
– Here, AS 65000 is showing `65137` as part of its AS path, suggesting it might be prepending to manipulate routing decisions.
3. **Options Analysis**:
– **Option A**: “AS 65000 is pre-pending AS 65137 to route advertisements.”
– This option suggests that AS 65000 is deliberately adding AS 65137 to the AS path. This matches the observed AS path, where AS 65000 has prepended `65137`.
– Therefore, this is the correct explanation.
– **Option B**: “The local AS is receiving two equal cost routes to 10.10.0.0/24.”
– There is no evidence in the exhibit to support the presence of two equal-cost routes.
– **Option C**: “The local AS is in the process of withdrawing the route from AS 65137.”
– Route withdrawal would not cause the AS path to include `65000 {65137 65224}`.
– **Option D**: “AS 65137 is advertising the 10.10.0.0/24 prefix.”
– While AS 65137 is part of the path, it does not explain the presence of AS 65000 in the path, making this option incorrect.
**Conclusion**:
The AS path `65000 {65137 65224}` is indicative of AS 65000 prepending AS 65137. Therefore, the correct answer is:
**A. AS 65000 is pre-pending AS 65137 to route advertisements.**
**References**:
– Juniper Networks documentation on BGP AS path manipulation and prepending techniques.
– BGP Best Practices and Routing Policies: [Juniper Networks BGP Best
Practices](https://www.juniper.net/documentation/en_US/junos/topics/concept/bgp-best-practices-routing-policie
– RFC 4271, A Border Gateway Protocol 4 (BGP-4): [RFC 4271](https://tools.ietf.org/html/rfc4271) which describes the behavior and attributes of BGP, including AS path prepending.

QUESTION 53
Exhibit

A network is using IS-IS for routing.
In this scenario, why are there two TLVs shown in the exhibit?

There are both narrow and wide metric devices in the topology

The interface specified a metric of 100 for L2.

Wide metrics have specifically been requested

Both IPv4 and IPv6 are being used in the topology

Explanation
TLVs are tuples of (Type, Length, Value) that can be advertised in IS-IS packets. TLVs can carry different kinds of information in the Link State Packets (LSPs). IS-IS supports both narrow and wide metrics for link costs. Narrow metrics use a single octet to encode the link cost, while wide metrics use three octets. Narrow metrics have a maximum value of 63, while wide metrics have a maximum value of 16777215. If there are both narrow and wide metric devices in the topology, IS-IS will advertise two TLVs for each link: one with the narrow metric and one with the wide metric. This allows backward compatibility with older devices that only support narrow metrics12.

QUESTION 54
When using OSPFv3 for an IPv4 environment, which statement is correct?

OSPFv3 only supports IPv4.

OSPFv3 supports both IPv6 and IPv4, but not in the same routing instance.

OSPFv3 is not backward compatible with IPv4

OSPFv3 supports IPv4 only on interfaces with family inet6 defined

Explanation
OSPFv3 is an extension of OSPFv2 that supports IPv6 routing and addressing. OSPFv3 is not backward compatible with IPv4 because it uses a different packet format and a different link-state advertisement (LSA) structure than OSPFv2. OSPFv3 also uses IPv6 link-local addresses as router IDs and neighbor addresses, instead of IPv4 addresses. To use OSPFv3 for an IPv4 environment, you need to enable the IPv4 unicast address family under [edit protocols ospf3] hierarchy level and configure IPv4 addresses on the interfaces.

QUESTION 55
Exhibit

The environment is using BGP All devices are in the same AS with reachability redundancy Referring to the exhibit, which statement is correct?

RR1 is peered to Client2 and RR2

RR2 is in an OpenConfirm State until RR1 becomes unreachable.

Client1 is peered to Client2 and Client3.

Peering is dynamically discovered between all devices.

BGP route reflectors are BGP routers that are allowed to ignore the IBGP loop avoidance rule and advertise IBGP learned routes to other IBGP peers under specific conditions. BGP route reflectors can reduce the number of IBGP sessions and updates in a network by eliminating the need for a full mesh of IBGP peers.
BGP route reflectors can have three types of peerings:
EBGP neighbor: A BGP router that belongs to a different autonomous system (AS) than the route reflector.
IBGP client neighbor: An IBGP router that receives reflected routes from the route reflector. A client does not need to peer with other clients or non-clients.
IBGP non-client neighbor: An IBGP router that does not receive reflected routes from the route reflector. A non-client needs to peer with other non-clients and the route reflector.
In the exhibit, we can see that RR1 and RR2 are route reflectors in the same AS with reachability redundancy.
They have two types of peerings: EBGP neighbors (R1 and R4) and IBGP client neighbors (Client1, Client2, and Client3). RR1 and RR2 are also peered with each other as IBGP non-client neighbors.

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To be eligible for the Juniper JN0-664 certification exam, candidates must have a valid JNCIA-Junos certification or equivalent knowledge, and have at least one year of experience working with Juniper Networks service provider routing and switching technologies. Service Provider, Professional (JNCIP-SP) certification exam covers a wide range of topics, including advanced routing and switching technologies, MPLS, VPNs, QoS, and multicast protocols.

Pass Juniper JN0-664 exam – questions – convert Tets Engine to PDF: https://www.2pass4sure.com/JNCIP-SP/JN0-664-actual-exam-braindumps.html