Juniper Networks Certified Internet Specialist (JNCIS-ENT) v11.0
Question 1
An administrator finds that traffic from a large file download over an HTTP session is not load-balanced across multiple links in a LAG. What is the possible cause?
- A. Per-packet load-balancing is not configured.
- B. The redundant path has a different IGP metric.
- C. The hash key is not configured in the forwarding-options stanza.
- D. This is the expected behavior.
Answer : D
Question 2
When the DF bit is set, which two actions will a router perform by default on a packet that is larger than the MTU of the interface? (Choose two.)
- A. The router drops the packet.
- B. The router sends an ICMP MTU exceeded message to the source.
- C. The router fragments and forwards the packet.
- D. The router generates a syslog message indicating that a packet was dropped due to the exceeded MTU.
Answer : AB
Question 3
What is the default value of the link-state advertisement (LSA) refresh timer in the Junos
OS?
- A. 10 minutes
- B. 30 minutes
- C. 50 minutes
- D. 60 minutes
Answer : C
Question 4
Which two statements are true regarding a designated intermediate system (DIS) in an IS-
IS network? (Choose two.)
- A. It performs a similar role to the designated router (DR) in OSPF.
- B. It is not allowed to send any PDUs on a designated intermediate system (DIS).
- C. A backup DIS is not elected.
- D. DIS selection uses the router's IP address as a tiebreaker.
Answer : AC
Question 5
Given the attached exhibit, what will happen to traffic sourced from 192.168.1.100 and destined to 172.16.1.69/32?
- A. It will use the default route.
- B. It will be routed to 10.17.0.1.
- C. It will be routed to 10.32.0.1.
- D. It will be dropped.
Answer : C
Question 6
Given that ge-0/1/1 is set up as a trunk port, which command set will NOT successfully set the trunk to carry VLANs 10 and 11?
- A. set interfaces ge-0/1/1.0 family ethernet-switching vlan members [Vlan10 Vlan11]
- B. set interfaces ge-0/1/1.0 family ethernet-switching vlan members Vlan10 members Vlan11
- C. set interfaces ge-0/1/1.0 family ethernet-switching vlan members Vlan10,Vlan11
- D. set interfaces ge-0/1/1.0 family ethernet-switching vlan members Vlan10set interfaces ge-0/1/1.0 family ethernet-switching vlan members Vlan11
Answer : C
Question 7
A network with five switches has been configured to run Rapid Spanning Tree Protocol
(RSTP) with default settings. How many seconds does it take to detect a failure between two neighboring switches?
- A. 2 seconds
- B. 3 seconds
- C. 6 seconds
- D. 15 seconds
Answer : C
Reference: Page 3-14 of the JNCIS-ENT Routing Study Guide - "As previously mentioned,
STP uses BPDUs to elect a root bridge, identify root ports for each switch, identify designated ports foreach physical LAN segment, prune specific redundant links to create a loop-free tree topology, and report and acknowledge topology changes. RSTP configuration BPDUs also function as keepalives. All RSTP bridges send configuration
BPDUs every 2 seconds by default. You can alter this value, if necessary."
Question 8
Which side of the OSPF router initiates the database description exchange?
- A. the side with the higher IP address
- B. the side with the higher router ID
- C. the side with the higher priority
- D. the side with the higher uptime
Answer : B
Question 9
Which configuration summarizes external routes in the 172.16.0.0/22 range into a single prefix on an ABR for Area 1?
- A. protocols { ospf { area 0.0.0.1 { nssa { default-lsa { default-metric 1; metric-type 1; } } area-range 172.16.0.0/22; } } }
- B. protocols { ospf { area 0.0.0.1 { nssa { area-range 172.16.0.0/22; } } } }
- C. protocols { ospf { area 0.0.0.1 { stub summaries; } } }
- D. protocols { ospf { area 0.0.0.1 { nssa; area-range 172.16.0.0/22 restrict; } } }
Answer : B
Question 10
Which statement about LACP is true?
- A. LACP is enabled by default on aggregated Ethernet interfaces.
- B. LACP is enabled by default on redundant trunk groups.
- C. The default mode of operation of an LACP interface is passive.
- D. At least one side of an LACP session must be configured as passive.
Answer : C
Question 11
Which configuration provides connectivity from the test routing instance to the
192.168.3.0/24 subnet in inet.0?
- A. routing-options { static { rib-group master2test.inet.0; route 192.168.3.0/24 next-hop 10.0.0.2; } rib-groups { master2test.inet.0 { import-rib [ inet.0 test.inet.0 ]; import-policy onlyStatic; } } } policy-options { policy-statement onlyStatic { term 1 { from protocol static; then accept; } term 2 { then reject; } } } routing-instances { test { instance-type forwarding; interface ge-0/0/0.500; } }
- B. routing-options { static { route 192.168.3.0/24 next-hop 10.0.0.2; } rib-groups { master2test.inet.0 { export-rib inet.0; import-rib [ inet.0 test.inet.0]; import-policy onlyStatic; } } } policy-options { policy-statement onlyStatic { term 1 { from protocol static; then accept; } term 2 { then reject; } } } routing-instances { test { instance-type forwarding; interface ge-0/0/0.500; } }
- C. routing-options { static { route 192.168.3.0/24 next-hop 10.0.0.2; } } policy-options { policy-statement onlyStatic { term 1 { from { instance master; protocol static; } then accept; } term 2 { then reject; } } } routing-instances { test { instance-type forwarding; interface ge-0/0/0.500; routing-options { instance-import onlyStatic; } } }
- D. routing-options { static { route 192.168.3.0/24 next-table test.inet.0; } } routing-instances { test { instance-type forwarding; interface ge-0/0/0.500; } }
Answer : A
Question 12
In the following output, what does the asterisk indicate?
- A. The interface is configured as a trunk.
- B. The interface is configured for spanning-tree protocol.
- C. The interface is active.
- D. The interface is inactive.
Answer : C
Question 13
Which command correctly assigns AS 65432 as the local router's autonomous system?
- A. set protocols bgp local-as 65432
- B. set routing-options local-as 65432
- C. set protocols bgp autonomous-system 65432
- D. set routing-options autonomous-system 65432
Answer : D
Question 14
Which statement regarding redundant trunk groups (RTGs) is true?
- A. STP and RTG can be configured on the same interface.
- B. An aggregated interface can be a member of an RTG.
- C. Members of an RTG can carry different VLANs.
- D. An RTG can contain up to 16 member links.
Answer : B
Question 15
Filter-based forwarding requires a match filter, a routing instance, and which of the following?
- A. a route map
- B. a RIB group
- C. a next hop
- D. a policy map
Answer : B