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JNCIA-Junos Practice Test Two Exam Answers

Question 1: Which statement is true about the internal link between the Routing Engine and the Packet Forwarding Engine?

  • It is rate limited to avoid DDoS attacks.

Question 2: How does a Junos device handle exception traffic?

  • Exception packets are sent to the Routing Engine for processing.

Question 3: Which two Junos product lines are used for switching? (Choose two.)

  • EX Series
  • MX Series           

Question 4: Which two Junos product lines are used primarily for security? (Choose two.)

  • SRX Series
  • J Series

Question 5: Which two Junos product lines are used primarily for routing? (Choose two.)

  • M Series
  • MX Series

Question 6: Which two statements are true about the Junos OS? (Choose two.)

  • Junos OS images are platform-specific.
  • All variants of Junos OS are based on the same base-level software.

Question 7: You are in configuration mode at the top of the hierarchy. How would you save your configuration to a file on the router?

  • save <filename>

Question 8: Which two CLI commands allow you to move between different configuration hierarchies? (Choose two.)

  • edit
  • up

Question 9: Which key could you use to auto-complete a command in the Junos CLI?

  • Spacebar

Question 10: You have made changes to the candidate configuration. Which action will make the router apply these changes?

  • Commit all changes at once, whenever ready.

Question 11: You are in configuration mode at the top of the hierarchy. You need to abort the changes that you have made and start again with a fresh copy of the active configuration. Which command should you use to accomplish this task?

  • rollback 0

Question 12: Which command allows you to commit your configuration changes, but has the device revert to the previous configuration automatically after 10 minutes if you do not commit a second time?

  • commit confirmed

Question 13: Which CLI command restores a previously active configuration?

  • rollback

Question 14: Uncommitted changes configured in Junos are located in which location?

  • candidate configuration

Question 15: What is the maximum number of rollback files a Junos device can store?

  • 50

Question 16: Which method loads the configuration that was active before your last commit?

  • rollback 1

Question 17: Which command allows you to verify the syntax and consistency of your configuration without actually activating your configuration?

  • commit check

Question 18: Which operational command allows you to compare two files stored on your router?

  • file compare files File-A File-B

Question 19: Which two statements are true regarding interface properties? (Choose two.)

  • IPv4 and IPv6 addresses are configured under the logical unit.
  • Physical parameters such as MTU, duplex mode, and speed are configured under the interface name.

Question 20: Which statement is correct about protocol families on an interface?

  • Multiple families and addresses can be configured under the same logical unit.

Question 21: What is the interface name for the third SONET interface on a PIC installed in PIC slot 1, FPC slot 1?

  • interface so-1/1/2

Question 22: Which operational CLI command displays packet and byte counts for an interface in real time?

  • monitor interface

Question 23: Which protocol family is required prior to assigning an IP address to an interface?

  • inet

Question 24: Which command configures an address of with a mask of on interface ge-0/0/0?

  • set interfaces ge-0/0/0 unit 0 family inet address

Question 25: Which statement is correct about logical units on Junos device interfaces?

  • A logical unit is always required.

Question 26: After issuing the show interfaces terse command, you notice that the status of one interface is “up down.” What does this status indicate?

  • The interface is administratively up, but the link status is down.

Question 27: How many IP addresses can be configured on a given interface?

  • as many as you want

Question 28: Which of the following commands will configure the maximum transmission unit (MTU) size of a Fast Ethernet interface?

  • set interfaces fe-0/0/0 mtu 1200

Question 29: Which two statements are correct regarding logical units on Junos devices? (Choose two.)

  • Logical units are always required for any interface configured with logical addresses such as IPv4 and IPv6.
  • Logical unit 0 is the only value allowed on interfaces running HDLC or PPP encapsulations.

Question 30: The interface ge-0/2/3 is located in which flexible PIC concentrator slot?

  • 0

Question 31: Which logical unit number must be configured on an interface using PPP encapsulation?

  • unit 0

Question 32: What are two logical interface properties? (Choose two.)

  • IP address
  • DLCI

Question 33: Which operational command is used to retrieve the serial numbers of components installed in a Junos device?

  • show chassis hardware

Question 34: Which operational command is used to show active alarms on a Junos device?

  • show chassis alarms

Question 35: Which operational command allows a user to view the exhaust temperatures of a Junos device?

  • show chassis environment

Question 36: Which operational command shows the contents of the LCD display on an MX Series device?

  • show chassis craft-interface

Question 37: Which operational command displays the temperature of the Routing Engine’s CPU?

  • show chassis routing-engine

Question 38: Which operational command allows you to decode packets, similar to tcpdump in UNIX?

  • monitor traffic interface interface-name

Question 39: Which CLI command will ping destination

  • user@host> ping

Question 40: The monitor traffic command provides access to which utility?

  • tcpdump

Question 41: Which two statements are correct about traceroute on Junos devices? (Choose two.)

  • It receives ICMP time-exceeded packets.
  • It transmits UDP packets.

Question 42: Which command initiates a loopback on a Gigabit Ethernet interface ge-0/0/0?

  • user@host# set interfaces ge-0/0/0 gigether-options loopback

Question 43: Which three are examples of next hops that can be defined for static routes? (Choose three.)

  • egress interface name
  • discard
  • next hop IP address

Question 44: Which statement accurately defines the role of a qualified next hop?

  • It is an alternative next hop for a static route.

Question 45: Which two statements are true about a qualified next hop? (Choose two.)

  • It allows independent protocol preference for static routes.
  • It is referred to as a floating static route.

Question 46: Which three statements are true about dynamic routing protocols? (Choose three.)

  • They share network layer reachability information among neighbors.
  • They are scalable.
  • They automate next-hop decisions.

Question 47: What are three advantages that dynamic routing protocols offer over static routing protocols? (Choose three.)

  • greater network scalability
  • lower administrative overhead
  • increased network availability

Question 48: What happens when a route does not match any user-configured policies?

The route is sent to the default policy.

Question 49: Given the policy shown in the exhibit, which action will be taken when a static route to is evaluated?

  • accept

Question 50: You are configuring a firewall filter. Which “from” configuration would match only those packets destined for

  • set term 1 from destination-address

Question 51: How do you send static routes to a RIP neighbor?

  • Apply an export policy within RIP that matches on the routes and then accepts them.

Question 52: Which two statements describe the default routing policy for BGP? (Choose two.)

  • Accept all BGP routes and import into inet.0.
  • Advertise all active BGP routes.

Question 53: A BGP route does not match any term within a routing policy applied to BGP. Which action is taken by the router for this route?

  • It advertises the route according to BGP rules.

Question 54: A packet has a source IP address of and a destination address of Given the firewall filter shown in the exhibit, which configuration change should be made to the filter so that this packet will be counted and discarded?

  • insert term 4 before term 1

Question 55: The routing policy shown in the exhibit has been applied as an export policy under protocols OSPF. However, the static route for destination is not being advertised. How can the configuration be corrected to allow the route to be advertised?

  • insert term 1 after term 2

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