Juniper JN0-649 JNCIP-ENT Exam Practice Test Instant Access

Question 1

Your enterprise network uses routing instances to support multitenancy. Your Junos devices use BGP to peer to multiple BGP devices. You must ensure that load balancing is achieved within the routing instance.

Which two statements would accomplish this task? (Choose two.)

AConfigure the multipath option at the [edit protocols bgp group <group-name> neighbor] hierarchy.

BConfigure the multipath option at the [edit protocols bgp group] hierarchy.

CConfigure a load-balance per-packet policy and apply it at the [edit routing-options forwarding-table] hierarchy.

DConfigure the multipath option at the [edit routing-instances <instance-name> routing-options] hierarchy.

Answer : B, C

Fortunately, the Juniper Networks BGP implementation supports the notion of a bandwidth community. This extended community encodes the bandwidth of a given next hop, and when combined with multipath, the load-balancing algorithm distributes flows across the set of next hops proportional to their relative bandwidths. Put another way, if you have a 10-Mbps and a 1-Mbps next hop, on average nine flows will map to the high-speed next hop for every one that uses the low speed.

Use of BGP bandwidth community is supported only with per-packet load balancing.

The configuration task has two parts:

Configure the external BGP (EBGP) peering sessions, enable multipath, and define an import policy to tag routes with a bandwidth community that reflects link speed.

Enable per-packet (really per-flow) load balancing for optimal distribution of traffic.

https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/topic-map/load-balancing-bgp-session.html

Question 2

You are troubleshooting a BGP connection.

Referring to the exhibit, which two statements are correct? (Choose two.)

APacket fragmentation is preventing the session from establishing.

BThe 192.168.1.5 peer has a misconfigured MD5 key.

CThe ge-0/0/1 interface is disabled.

DThe 192.168.1.4 peer has a misconfigured autonomous system number.

Answer : B, D

Question 3

You want to create an OSPF area that only contains intra-area route information in the form of Type 1 and Type 2 LSAs.

In this scenario, which area is needed to accomplish this task?

Atotally non-to-stubby area

Btotally stubby area

Cstub area

Dnon-to-stubby area

Answer : B

A totally stubby area (TSA) is a stub area in which summary link-state advertisement (type 3 LSAs) are not sent. A default summary LSA, with a prefix of 0.0. 0.0/0 is originated into the stub area by an ABR, so that devices in the area can forward all traffic for which a specific route is not known, via ABR.

Question 4

Which three configuration parameters must match on all switches within the same MSTP region? (Choose three.)

AVLAN to instance mapping

Brevision level

Cconfiguration name

Dbridge priority

Eregion name

Answer : A, B, E

When enabling MSTP, you define one or more MSTP regions. An MSTP region defines a logical domain where multiple spanning-tree instances (MSTIs) can be administered independently of MSTIs in other regions, setting the boundary for bridge protocol data units (BPDUs) sent by one MSTI. An MSTP region is a group of switches that is defined by three parameters:

Region name---User-defined alphanumeric name for the region.

Revision level---User-defined value that identifies the region.

Mapping table---Numerical digest of VLAN-to-instance mappings.

https://www.juniper.net/documentation/us/en/software/junos/stp-l2/topics/topic-map/spanning-tree-configuring-mstp.html

Question 5

You are asked to troubleshoot voice quality issues on your newly implement VoIP network. You notice that the voice packets are being dropped. You have verified that the packets are correctly marked for expedited forwarding queue.

Referring to the exhibit, what must you configure to solve the problem?

AYou must configure a multifield classifier to put the VoIP traffic in the correct queue.

BYou must configure a rewrite rule to ensure that the traffic is scheduled properly in the device.

CYou must configure a scheduler to allocate bandwidth to the expedited forwarding queue.

DYou must configure a policer to ensure that the queue is not being starved.

Answer : C

Question 6

You are asked to enforce user authentication using a captive portal before users access the corporate network.

Which statement is correct in this scenario?

AHTTPS is the default protocol for a captive portal.

BA captive portal can be bypassed using an allowlist command containing a device's IP address.

CWhen enabled, a captive portal must be applied to each individual interface.

DAll Web browser requests are redirected to the captive portal until authentication is successful.

Answer : D

You can set up captive portal authentication on your switch to redirect all Web browser requests to a login page that requires users to input a username and password before they are allowed access. Upon successful authentication, users are allowed access to the network and redirected to the original page requested. Junos OS provides a customizable template for the captive portal window that allows you to easily design and modify the look of the captive portal login page. You can modify the design elements of the template to change the look of your captive portal login page and to add instructions or information to the page. You can also modify any of the design elements of a captive portal login page. The first screen displayed before the captive login page requires the user to read the terms and conditions of use. By clicking the Agree button, the user can access the captive portal login page. https://www.juniper.net/documentation/us/en/software/junos/user-access/topics/topic-map/user-authentication-captive-portal.html

Question 7

Referring to the exhibit, anycast RP is implemented to ensure multicast service availability. The source is currently sending multicast traffic using group 239.1.1.1 and R3 is receiving PIM register messages, but R2 does not have active source information.

In this scenario, what are two methods to receive the active source information on R2? (Choose two.)

AConfigure an RP set in PIM on R1, allowing R1 to forward PIM register messages to R2 and R3 in the set.

BConfigure an MSDP protocol between R2 and R3.

CConfigure an RP set in PIM on R2 and R3, allowing the RPs to forward PIM register messages to the other RPs in the set.

DConfigure an MSDP protocol between R1 and R2.

Answer : A, C

https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/ref/statement/rp-set-edit-protocols-pim.html

Juniper JN0-649 Enterprise Routing and Switching, Professional JNCIP-ENT Exam Practice Test