JN0-643 Exam Questions

Referring to the exhibit, which two statements are correct? (Choose two.) [edit protocols ospf] user@R2# show area 0.0.0.6 { nssa { default-lsa default-metric 10; area-range 184.23...

Which statement is true regarding OSPF multi-area adjacencies?

Referring to the exhibit, which type of LSA will be seen on router A for routes originating in Customer A's network?

Referring to the exhibit, which statement is true? [edit protocols ospf] user@area-1-abr# show area 0.0.0.1 { nssa { default-lsa { default-metric 10; metric-type 2; type-7; } no-su...

Referring to the exhibit, you are asked to prevent the 184.16.1.0/24 route from entering the backbone. Which configuration statements would accomplish the task?

Referring to the exhibit, which two statements are true? (Choose two.) user@router> show route protocol bgp detail inet6.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden...

You are asked to connect Area 2 to the backbone. Which configuration would be required on R3?

Referring to the exhibit, you are asked to verify certain routing information within your OSPFv3 routing domain. You must review the prefixes learned from R3. Which two LSA types f...

ISP-A is advertising the 200.0.3.0/24 route to R1. R1 is advertising this BGP route to R2 but the route is hidden on R2. Referring to the exhibit, which statement is correct about...

Referring to the exhibit, which AS path regular expression will match only the 10.16.1.0/24 and 10.16.2.0/24 routes? user@router# run show route receive-protocol bgp 192.168.4.101...

Referring to the exhibit, you must ensure that traffic to the 2001:10:5::/64 network leaves AS 2 through R3. Given that all BGP attributes are at their default, how would you accom...

On AS1, which two attributes are used to influence inbound traffic from the other ASs shown in the exhibit? (Choose two.)

Referring to the exhibit, R2 is sending a route to R1 with a community value. Which statement is correct?

Which set of BGP attributes is preferred by the Junos OS?

Referring to the exhibit and based on the output below from Sw-1 and Sw-2, which statement is true? Sw-1> show spanning-tree mstp configuration MSTP information Context identifier...

R4 receives BGP prefixes for AS 50 from both R2 and R3. You want to ensure that R4 chooses R3 as the preferred path to reach 50.50.50/24. Referring to the information shown in the...

You want to provide reachability to your data center by advertising its subnet throughout your upstream peer AS. However, you do not want this prefix advertised any further. Which...

Referring to the exhibit, you want router A to have an EBGP peering with router C. They are both connected through router B, which does not have BGP running, and has static routes...

You are configuring PIM-SM for your network, and want to use a statically configured RP. What are two ways to accomplish this task? (Choose two.)

Your company has PIM running on some critical routers in your network, but another engineer has requested that you configure a PIM policy to prevent R2 from becoming a PIM neighbor...

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. W...

Referring to the configuration shown in the exhibit, which statement is true?

When enabling MVRP for dynamic VLAN registration, which three timers would be configured on an interface? (Choose three.)

Which two statements are correct about L2PT? (Choose two.)

Referring to the exhibit, a customer noticed that the 802.1Q-tunneled packets received on SwitchB are being dropped. What is causing this problem?

You are a service provider and have multiple customers in a building. You are installing a new switch that can host all of your customers. However, you would like to ensure that on...

What are three types of PVLAN broadcast domains? (Choose three.)

Two PCs are attached to a hub, which is attached to port ge-0/0/0 on your EX Series switch. You must separate the incoming traffic from the PCs into two VLANs. What should you use...

Looking at the traceoptions output in the exhibit, why are the OSPF routers stuck in Init state? Mar 16 17:54:51.930726 OSPF periodic xmit from 172.14.10.1 to 224.0.0.5 (IFL 69 are...

Referring to the exhibit, what would explain interface ge-0/0/3.0 being active in VLANs v1, v2, and v3? {master:0}[edit] user@switch# show vlans v1 { vlan-id 1; interface { ge-0/0/...

You are asked to implement a filter-based VLAN assignment. You have created the firewall filter and must apply this filter to the incoming interface. Where must this filter be appl...

Referring to the exhibit, you are attempting to configure L2PT for VLAN v200 but the configuration will not commit. {master:0}[edit] user@switch# show vlans v200 { vlan-id 200; int...

Referring to the exhibit, you are asked to ensure that CE1 can communicate with CE2 using VLAN 150. Which configuration meets this requirement on S1?

You are asked to separate the human resources group from the finance group on the company network even though they share the same VLAN. You consider using PVLANs, and you delegate...

You have implemented a firewall-based VLAN filter to map traffic from subnet 192.168.40.0/24 to a VLAN named vlan_40. However, you have not been successful in getting the traffic m...

When you try to commit your 802.1Q tunneling configuration, you receive the error shown in the exhibit. [edit] user@switch# commit error: Trunk interface <ge-0/0/10.0> can not be m...

What are two reasons for the commit error shown in the exhibit? (Choose two.) [edit protocols vstp] 'vlan all' Cannot configure VSTP on all VLANs when more than 253 VLANs are confi...

Referring to the exhibit, which two statements are true regarding the MSTP port role and port state of ge-0/0/0 and ge-0/0/1 on SW1?

Which two statements are correct about MSTP? (Choose two.)

You are asked to implement MSTP on all devices in your Layer 2 network. Which three parameters must match on all devices within the same region? (Choose three.)

You are asked to implement VSTP on all devices in your Layer 2 network. Which three statements are correct? (Choose three.)

Referring to the exhibit, which two statements are correct about the MSTP configuration? (Choose two.) user@switch> show spanning-tree bridge STP bridge parameters Context ID : 0 E...

A colleague recently implemented MSTP in your Layer 2 network and is having trouble determining why it is not working properly. You are asked to review the outputs provided in the...

A network engineer has configured MSTP on several switches for loop protection. You must verify the work and ensure that the appropriate parameters match on all switches. MSTP info...

Referring to the exhibit, a customer observes that the MSTP instance between SwitchA and SwitchB is not converging correctly. user@SwitchA# show protocols mstp configuration-name r...

Your company makes extensive use of VSTP in your network for loop protection. The network is at the VSTP VLAN limit and must protect additional VLANs. Which command allows you to p...

You are asked to set up 802.1X port authentication for all access ports on your EX Series switch. You must ensure that only one user is allowed to authenticate per port and all oth...

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 thi...

Your company uses 802.1X to authenticate your users. You want to provide access to the Internet when users cannot authenticate on the RADIUS server or when the RADIUS server become...

Your company recently implemented Layer 2 authentication and access control to secure users accessing the corporate network. You implemented 802.1X, MAC RADIUS, and a captive porta...