JNCIA-Junos Practice Test Two Exam Answers

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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 192.168.1.1 with a mask of 255.255.255.0 on interface ge-0/0/0?

• set interfaces ge-0/0/0 unit 0 family inet address 192.168.1.1/24

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 10.0.29.1?

• user@host> ping 10.0.29.1

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 172.10.16.0/24 is evaluated?

• accept

Question 50: You are configuring a firewall filter. Which “from” configuration would match only those packets destined for 10.10.10.1?

• set term 1 from destination-address 10.10.10.1

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 20.2.2.1 and a destination address of 10.1.1.1. 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 10.1.1.0/24 is not being advertised. How can the configuration be corrected to allow the route to be advertised?

• insert term 1 after term 2