Sunday, July 25, 2010

JNCIA-JUNOS PRE-Assessment Exam

JNCIA-JUNOS PRE-Assessment Exam

Q1: What are two functions of the routing-engine? (Choose two)

  • To build OSPF and ISIS adjacencies.
  • To build the layer 2 and layer 3 forwarding tables.
  • To receive and process packets that could not be forwarded by the pfe.
  • To verify that packets arriving at the router are allowed by any configured firewall filters.

Q2: In which mode are users allowed to monitor and troubleshoot the software, network connectivity, and hardware

  • Privilege mode
  • Operational mode
  • Configuration mode
  • Monitoring mode

Q3: in configuration mode you see the following prompt [edit interfaces fe-1/1/1] user@router#

Which command will take you to operational mode?

  • End
  • Exit
  • Quit
  • Exit configuration-mode

Q4: what are two functions of the packet forwarding engine? (Choose two)

  • To build the layer 2 forwarding table
  • To forward packets based on the forwarding table
  • To send ICMP time exceeded messages when the ttl reaches 0
  • To implement policing, firewall filtering, and QoS

Q5: Which character in the JUNOS software CLI allows you to filter and manipulate command output?

  • < >
  • ?
  • |

Q6: When you first login into a router, how does the router indicate that factory defaults are being used?

  • The router host-name is Anmesiac
  • The password you used to login is JUNOS
  • The router goes immediately into configuration mode after you login.
  • The router allows you to get into configuration mode without you having to login.

Q7: Which statement is correct about protocol families on an interface?

  • Only one family is allowed on an interface
  • Only one address per family is allowed on an interface
  • Only one address per family is allowed on a given unit
  • Multiple address families and addressed can be configured under the same unit.

Q8: What is the third SONET interface on a PIC installed in PIC slot 1, FPC slot 1?

  • Interface sonnet-1/3/1
  • Interface so-1/1/2
  • Interface so-3/1/1
  • Interface so-0/1/1.2

Q9: Which three user authentication methods are supported by the JUNOS software? (Choose three)

  • LDAP
  • Web authentication

Q10: Which two JUNOS software authentication methods require the use of a server for authentication? (Choose two)

  • CHAP
  • Kerberos

Q11: Which three configuration components are required to create a user account using locat authentication? (Choose three)

  • Permissions
  • Class
  • User name
  • User ID
  • User authentication (password)

Q12: Which command allows you to quickly verify the state of all physical and logical interfaces?

User@host> show interface summary

User@host> show interfaces terse

User@host> show interfaces brief

User@host> show interfaces routing

Q13: A network administrator would like to verify the active alarms on interface so-0/0/0.0.

Which command displays this information?

  • Show alarms
  • Show interfaces terse
  • Show alarms extensive
  • Show interfaces extensive

Q14: what could you type to view all of the PICs within a router as well as their serial numbers?

  • Show chassis interfaces
  • Show chassis pics
  • Show chassis inventory
  • Show chassis hardware

Q15: Which routing table is used for all IPv4 unicast forwarding?

  • inet.0
  • Inet4.0
  • Ipv4.0
  • Forwarding.0

Q16: What is a characteristic of route preference?

  • it is the same as a route metric
  • it must be assigned manually for each protocol
  • a higher preference is better than a lower preference
  • A lower preference is better than a higher preference.

Q17: What is the correct CLI command to display the routing table?

  • Show routing-table
  • Show routes
  • Display routes
  • Show route

Q18: which two are considered match criteria in a policy? (Choose two)

  • Next-term
  • As path
  • Prefix-file
  • Community

Q19: Which policy action is considered a flow control action?

  • Accept
  • Next term
  • Reject
  • Preference

Q20: What is the proper order for CoS processing for egress packets on a juniper router?

  • Multifield Classifier > scheduler/sharper/RED>Rewrite marker
  • Policer > Multifield Classifier > Scheduler/shaper/RED > Rewrite Marker
  • Scheduler/shaper/RED > Multifield Classifier > Policing > Rewrite Marker
  • Rewrite marker > Policer > Multifield Classifier > Scheduler/shaper/RED

Q21: What is the purpose of queuing traffic in a CoS scenario ?

  • it allows routed traffic to be handled before switched traffic.
  • It allows the handling of traffic based on its TOS code
  • It allows traffic to be classified into forwarding classes.
  • It allows traffic to be forwarded based on its forwarding class.

Q22: Which command swquence shows most of the CoS configuration for an interface?

  • show interface queue ge-0/0/0
  • show queues interfaces ge-0/0/0
  • show class-of-serviice interface ge-0/0/0
  • show interface queue detail

Q23: what is the binary equivalent of

  • 01100100 00011001 01100010 11001111
  • 01110100 00011001 01101010 11001111
  • 01100100 00011001 01101010 11001111
  • 11100100 00001001 01100010 11001110

Q24: What is typically used to break up individual broadcast domains?

  • Bridge
  • Router
  • Switch
  • Hub

Q25: Which two statements are true regarding collisions on an Ethernet segment? (Choose two)

  • When a collision occurs, the device with the lowest MAC address sends a jam signal to notify all other devices of the collision
  • When a collision occurs, both devices stop transmitting, wait a random period of time, verify the wire is idle and retransmit.
  • When a cjollision occurs, the device with the lowest MAC address is permitted to retransmit first.
  • When a collision occurs, both transmitting devices send a jam signal jto notify all other devices of the collision.

1 comment:

  1. Hi .. I took this exam today 5/2/2014 .. and I want to share it with you .. cuz these questions are expired now :) ... my email is ( .. best of luck