Juniper Juniper Certifications JN0-343 Questions & Answers

• Question 231:

  You want to enable an Ethernet Link Aggregation Group (LAG) on an EX Series switch. Which commands enable this?

  A. [edit chassis] user@switch# set aggregated-devices ethernet device-count 1 [edit interfaces] user@switch# set ae1 aggregated-ether-options minimum-links 1 user@switch# set ae1 aggregated-ether-options link-speed 10g user@switch# set ae1 unit 0 family inet address 192.168.1.0/24 user@switch# set xe-0/1/0 ether-options 802.3ad ae1 user@switch# set xe-1/1/0 ether-options 802.3ad ae1

  B. [edit chassis] user@switch# set chassis aggregated-devices ethernet device-count 2 [edit interfaces] user@switch# set interface ae0 aggregated-ether-options minimum-links 1 user@switch# set interface ae0 aggregated-ether-options link-speed 10g user@switch# set interface ae0 unit 0 family inet address 192.168.1.0/24 user@switch# set interface xe-0/1/0 ether-options 802.3ad ae0 fast user@switch# set interface xe-1/1/0 ether-options 802.3ad ae0 fast

  C. [edit chassis] user@switch# set chassis aggregated-devices ethernet device-count 1 [edit interfaces] user@switch# set interface ae0 aggregated-ether-options minimum-links 1 user@switch# set interface ae0 aggregated-ether-options link-speed 10g user@switch# set interface ae0 unit 0 family inet address 192.168.1.0/24 user@switch# set interface xe-0/1/0 ether-options 802.3ad ae0 fast user@switch# set interface xe-1/1/0 ether-options 802.3ad ae0 fast

  D. [edit chassis] user@switch# set aggregated-devices ethernet device-count 2 [edit interfaces] user@switch# set ae1 aggregated-ether-options minimum-links 1 user@switch# set ae1 aggregated-ether-options link-speed 10g user@switch# set ae1 unit 0 family inet address 192.168.1.0/24 user@switch# set xe-0/1/0 ether-options 802.3ad ae1 user@switch# set xe-1/1/0 ether-options 802.3ad ae1

  Correct Answer: D

• Question 232:

  -- Exhibit -protocols {

  bgp {

  export exp-rt;

  group int {

  type internal;

  local-address 192.168.1.1;

  neighbor 192.168.1.2;

  neighbor 192.168.1.3;

  }

  group ext {

  type external;

  peer-as 65002;

  neighbor 172.16.1.2;

  }

  }

  }

  policy-options {

  policy-statement exp-rt {

  term 1 {

  from {

  route-filter 200.200.200.0/24 orlonger;

  }

  then {

  community add no-export;

  accept;

  }

  }

  }

  }

  -- Exhibit ?

  

  Referring to the exhibit, route 200.200.200.0/24 is exported into BGP and the peering routers use default BGP policies. Which statement describes the advertisement for the 200.200.200.0/24 route?

  A. The route will only be advertised intra-AS.

  B. The route will only be advertised inter-AS.

  C. The route will be advertised both intra-AS and inter-AS.

  D. The route will not be advertised both intra-AS and inter-AS.

  Correct Answer: A

• Question 233:

  A network administrator has just received a new EX Series switch to replace a router and Layer 2 switch. The network administrator has configured all of the Layer 2 parameters, however users are reporting that they can only reach devices within their own VLAN.

  What would solve the problem?

  A. The network administrator must configure inter-VLAN routing.

  B. The network administrator must administratively enable the VLAN.

  C. The network administrator needs to clear the ARP table.

  D. The network administrator needs to clear the bridge table.

  Correct Answer: A

• Question 234:

  When is MAC limiting performed on a frame from an unknown source MAC address?

  A. when the ingress PFE sends header information to RE

  B. when the ingress PFE performs a MAC address lookup

  C. when the PFE adds the MAC address to the bridge table

  D. when the RE adds the MAC address to the bridge table

  Correct Answer: A

• Question 235:

  -- Exhibit -SITE1:

  routing-options {

  autonomous-system 65001;

  }

  protocols {

  bgp {

  group 65002 {

  neighbor 10.200.12.1 {

  peer-as 65002;

  }

  }

  }

  }

  SITE2:

  routing-options {

  autonomous-system 65002;

  }

  protocols {

  bgp {

  group 65001 {

  neighbor 10.200.12.2 {

  peer-as 65003;

  }

  }

  }

  }

  -- Exhibit -Referring to the exhibit, SITE1 is configuring an EBGP peering with SITE2. SITE2 configured the incorrect peer AS during a maintenance window and now is unable to change the configuration until the next maintenance window.

  Which configuration would you use on SITE1 to establish the EBGP peering?

  A. protocols { bgp { group 65002 { passive; neighbor 10.200.12.2 { peer-as 65002; } } } }

  B. protocols { bgp { group 65002 { accept-remote-nexthop; neighbor 10.200.12.2 { peer-as 65002; } } } }

  C. protocols { bgp { group 65002 { local-as 65003; neighbor 10.200.12.2 {

  peer-as 65002;

  }

  }

  }

  }

  D. protocols { bgp { group 65002 { as-override; neighbor 10.200.12.2 { peer-as 65002; } } } }

  Correct Answer: C

• Question 236:

  -- Exhibit -[edit protocols rstp] user@switch# show bridge-priority 32k;

  max-age 20;

  hello-timer 2;

  forward-delay 15;

  interface ge-0/0/11.0 {

  disable;

  }

  interface ge-0/0/12.0 {

  cost 20000;

  mode point-to-point;

  }

  interface ge-0/0/13.0 {

  priority 128;

  mode shared;

  }

  interface ge-0/0/14.0 {

  edge;

  }

  bpdu-block-on-edge;

  -- Exhibit -The exhibit shows the RSTP configuration for your EX Series switch. The switch begins receiving BPDUs on a port and disables that port.

  Which port is disabled?

  A. ge-0/0/11.0

  B. ge-0/0/12.0

  C. ge-0/0/13.0

  D. ge-0/0/14.0

  Correct Answer: D

• Question 237:

  Which statement correctly describes the Border Gateway Protocol (BGP)?

  A. A switching protocol used between switches on a branch office LAN.

  B. A routing protocol used between autonomous systems.

  C. A redundancy protocol that assists with interface failover on the LAN side of a device at the network edge.

  D. A security protocol that monitors traffic on a gateway device and shuts down a port based on configured thresholds.

  Correct Answer: B

  Reference: JNCIS-ENT Routing Study Guide, Border Gateway Protocol ?Chapter 4?

• Question 238:

  You have just configured a static route for management traffic, however you would like to prevent the route from being redistributed into a dynamic routing protocol. Which command should be added to accomplish this?

  A. passive

  B. reject

  C. no-install

  D. no-advertise

  Correct Answer: D

• Question 239:

  Which statement describes the Spanning Tree Protocol (STP)?

  A. A switching protocol used to carry default VLANs.

  B. A port security feature used to limit MAC addresses on a port.

  C. A switching protocol that prevents loops.

  D. A high availability protocol used to gracefully restart a switch.

  Correct Answer: C

  Reference:JNCIS-ENT Switching Study Guide, Spanning Tree ?Chapter 3?

• Question 240:

  What is the purpose of the native VLAN?

  A. The native VLAN is used to assign the trunk's default VLAN if a global default VLAN is not configured.

  B. The native VLAN is only used on VoIP interfaces to allow a separate VLAN-ID for the voice VLAN and data VLAN.

  C. The native VLAN assumes VLAN 1 when no default VLAN is configured.

  D. The native VLAN allows the interface to accept untagged packets.

  Correct Answer: D