JNCIA Flashcards
You accidentally configured interface so-0/0/0.0 with 1.1.1.1/32 instead of 1.1.1.1/30; Which two solutions could you use to correct this configuration? (Choose two)
B. [edit interfaces so-0/0/0.0] user@router# rename family inet address 1.1.1.1/32 to address 1.1.1.1/30 D. [edit interfaces so-0/0/0.0] user@router# delete family inet address user@router# set family inet address 1.1.1.1/30
How do you write the current candidate configuration to the permanent storage media?
A. [edit] user@router# save /var/tmp/current.conf
Referring to the exhibit, you want to block HTTP access to Web-Server from the subnet where Mai-User is located. All other traffic should be permitted. Which firewall filter configuration do you use?
D. [edit firewal family inet filter STOP-MAL-USER] user@router# show term one{ from{ source-address{ 200.200.200.0/24; } destination-address{ 100.100.100.10/32; } protocol tcp; destination-port http; } term two { then { accept; } }
An administrator is unable to ping any address on the 10.0.19.0/24 subnet. To identify the problem, the administrator uses the command shown in the exhibit. Which step should be taken to solve the problem?
B. Issue the command activate interfaces fe-0/0/1.513
referring to the exhibit, which type of classifier is being used in the CoS configuration?
A. behavior aggregate
Given the routing entries shown in the exhibit, which next-hop IP address will be used for the destination IP address 192.168.1.142? (Assume that only static routes are available for the destination)
D.
10.20.14.130
Given the configuration and routing table in the exhibit, which routes will be advertised to OSPF neighbors because of the demo policy?
192.168.0.0/17, 192.168.50.0/24 and 192.168.51.0/24
You have been asked to establish reachibility between Router 1’s and Router2’s loopback addresses as shown in the exhibit.
Which two steps will accomplish this task? (Choose two)
Create a static route on Router 1 to 192.17.28.1 with a next hop of 10.10.10.2
Create a static route on Router 1 to 192.17.28.1 with a next hop of 10.10.10.2
Given the configuration shown in the exhibit, what will happen to traffic from source 10.10.10.25 destined to 200.200.200.1?
The traffic will be policed
In the exhibit, what does the (>) symbol indicate?
The next hop of 172.25.213.11 is selected
Using the routing table shown in the exhibit, what will be the next-hop IP address used for destination IP address 192.168.1.1? (Assume that the only routes to this destination are static routes)
D.
10.20.106.10
Referring to the exhibit, which two statements are true? (Choose two)
The route 192.168.1.0/25 is accepted
RIP routes will be exported into OSPF
Referring to the exhibit, which statement is correct?
The asterisks indicate a response time out
Referring to the exhibit, which command would you use to add an additional address to the ge-0/0/9 unit 0 interface?
[edit interfaces ge-0/0/9 unit 0]
user@router# set family inet address 192.168.100.1/24
What is an advantage of dynamic routing?
Dynamic routing can provide increased network availability when compared to static routing
Which three functions are available under the “Maintain” tab of J-Web? (Choose three)
download and delete log files
reboot the system
view and add licenses
What represents the binary equivalence of 148
10010100
What is a valdi multicast MAC address?
01:00:5E:28:12:95
What is the role of route preference?
It is used as a tie breaker when the same prefix is available through multiple sources
What is the default export routing policy for RIP?
Accept no routes
How do you ping from configuration mode?
[edit interfaces]
user@router# run ping 1.1.1.1
Which two external authentication methods are supported by the Junos OS for user authentication? (Choose two)
RADIUS
TACACS+
When attepting to view the OSPF routes in the routing table, you issue the command show route table inet but no OSPF routes are displayed. What is the problem?
THe OSPF routes are located in the inet 0 routing table
You’ve configured an interface with an IP address and commited the change. You then commited a change that added an exception in a firewall filter to allow this network through the filter. You realize that this work was done on the wrong router.
How do you undo all these changes?
rollback 2
Which statement is true regarding syslog on Junos devices?
You can configure the router to send log messages to the console
You issue the ping interface tl-1/1/0 1.1.1.1 bypass-routing count 1000 rapid command
Which statement is correct?
The count parameter allows the router to send out 1000 pings and then stop
Which command do you use to show active alarms?
show system alarms
What is the default SNMP permision level on Junos devices?
read-only
What is a route filter?
a single prefix that can be configured within a policy
You have been assigned the 66.96.130.0/24 network and need to segment ito at least 60 subnets. Which network mask meets this requirement?
/30
What does the command show | compare rollback 1 display?
the difference between the current candidate configuration and the archived configuration from one commit ago
You are configuring new BGP neighbor and want to view the configuration for the interface ge-0/0/0.42. Which command do you use to achieve this result?
[edit protocols bgp group external]
user@router# top show interfaces ge-0/0/0.42
Your network administrator has asked you to view the real-time interface usage on ge-0/0/0,
Which command whould be used?
monitor interface ge0/0/0
What are two Junos processes? (Choose two)
SNMP daemon (snmpd)
Routing protocols daemon (rdp)
Which statement describes an advantage of a dynamic routing?
Dynamic routing is typically more scalable when compared to static routing
You have a network containing 120 routers. You must establish and maintain connectivity between the loopback interfaces of all routers. Because of the critical services using the network, you need redundancy and fast failover. Which routing protocol should you use in this scenario?
OSPF
When configuring more than one archival site, which statement is true?
The system will not transfer to a secondary site unless the previous site fails
Which statement is true regarding the forwarding plane?
The forwarding plane contains the Packet Forwarding Engine (PFE)
Which two commands may be used when configuring an IP address for a Gigabit Ethernet interface? (Choose two)
set interfaces ge-0/0/0.0 family inet address 10.1.1.1/24
set interfaces ge-0/0/0 unit 0 family inet address 10.1.1.1/24
What information is used by a switch to forward an Ethernet frame to its destination?
destination MAC address
Which statement is true regarding the password-recovery process?
You must have a console connection
Which two statements are correct regarding the default protocol preference values? (Choose two)
OSPF’s preference value is lower than BGP
RIP is preferred over OSPF external routes
Which command is used to display all output at once?
show interfaces | no-more
Which two statements are true about terms in a routing policy? (Choose two)
If a term does not contain a from statement, the Junos OS will not commit
A then statement is not mandatory in a term
A packet is evaluated against three user-defined terms within a firewall filter and no match is found. What correctly describes the action the firewall filter will take for this packet?
The filter will discard the packet and take no additional action
You have received a default route through BGP from your ISP and you want to redistribute it into OSPF. Which mehtod will accomplish this?
Apply an export policy to OSPF that exports the default route
What are three examples of dynamic IGPs? (Choose three)
OSPF
IS-IS
RIP
By default if equal-cost paths exists for the same destination, which action will the router take?
Randomly select one of the available paths to send traffic
You have been asked to develop an application that uses only connection-oriented protocols. Which two protocols can you use? (Choose two)
PPP
TCP
You accidentally configured interface so-0/0/0.0 with 1.1.1.1/32 instead of 1.1.1.1/30; Which two solutions could you use to correct this configuration? (Choose two)
[edit interfaces so-0/0/0.0]
user@router# rename family inet address 1.1.1.1/32 to address 1.1.1.1/30
[edit interfaces so-0/0/0.0]
user@router# delete family inet address
user@router# set family inet address 1.1.1.1/30
When considering the default behavior of Junos plattforms, which statement is true about archiving configurations?
A system log message is generated, confirmed the transfer attempt
What are three valid match criteria in a firewall filter applied to a Layer 3 interface? (Choose three)
IP address
Protocol
Port
Which class-of-service component allows you to define the bandwidth allocated to different traffic types?
scheduling
What is a valid option when using the ping command?
packet size
Which statement is true regarding an Ethernet collision domain?
If a switch is used, the collision domain is limited to each device and the switch
What represents the binary equivalence of 96?
01100000
By default, what are three valid routing tables? (Choose three)
inet. 0
inet6. 0
inet. 3
Which two can be used to create and apply an export policy that advertises static routes to RIP neighbors? (Choose two)
set protocols rip export demo
edit policy-options policy-statement demo set term 1 from protocol static set term 1 then accept
You must segement your internal 192.168.1.0/24 network into a minimun of 12 subnet, each containing a minimun of 12 hosts. Which network mask do you use?
/28
Which two statements are true regarding trace options on Junos devices? (Choose two)
You can see the contents of the log file by entering the show log command
The file name and set of flags may be specified when enabling trace options
What are the usable host on the 96.6.128.0/19 network?
96.6.128.1 through 96.6.159.254
Which command will save the current active configuration as the rescue configuration?
user@router> request system configuration rescue save
Which three steps are parts of the root password recovery process? (Choose three)
Reboot the device
Run the recovery script
Reset the root password
Using the command user@router# load override lastest.conf where in the file system will the lastest.conf be located?
/var/home/user
Which user authenticaton method is supported by the Junos OS as the last resort alternative?
local user database
Which command is used to enable access to J-Web using HTTPS?
set system services web-management https
Which command do you use as a valid way to view the PICs within a router as well as the PICs’ serial numbers?
show chassis hardware
You have been asked to configure your router to send link-related SNMP trap notifications to the network managemetn system (NMS) located at address 172.16.17.1
Which two commands are required?
set snmp trap-group my-trap-group targets 172.16.17.1
set snmp trap-group my-trap-group categories link
set snmp trap-group my-trap-group categories link?(Choose two)
checksum
type
What must be configured prior to the first commit after factory defaults are loaded?
root authentication
Which two commands allow you to return to a previous verision of software on the device? (Choose two)
request sytem software add
request sytem software rollback
What are three physical interface properties? (Choose three)
payload scrambling
FCS
Link Speed
Which two statements are correct about Layer 2 broadcast frames? (Choose two)
Layer 2 broadcast frames are processed by all devices on the same VLAN
Layer 2 broadcast frames are relayed by switches to devices on the same VLAN
There are three static routes in the routing table that need to be announced to your OSPF preers. Which method is used to accomplish this?
Apply an export policy to OSPF that injects the static routes into OSPF
Which two statements are true of a network mask? (Choose two)
A subnet mask specifies the portion of an IP address that represents a network prefix
A subnet mask specifies the portion of an IP address that represetns network hosts
Which statement is true about the forwarding table?
The forwarding table is stored in the control plane and in the forewarding plane
Which login class permision will allow a user to use the telnet utility?
network permision
Which two statements are true about the forwarding table? (Choose two)
The forwarding table constains only active routes
The forwarding table is used to process transit packets
How do you write the current candidate configuration to the permanent storage media?
user@router# save /var/tmp/current.conf
You issue the ping interface t1-1/1/0 1.1.1.1 bypass-routing count 1000 rapid command.
Which statement is correct?1
The count parameter allows the router to send out 1000 pings and then stop.
What must be configured prior to the first commit after factory defaults are loaded?
root authentication
You have been asked to configure a login class that will permit its users to view and edit the configuration. The class should allow a user to view the entire configuration, but only to edit the interfaces, routing-options, and protocols hierarchies. Which configuration accomplishes this login class?
permissions [view-configuration clear network view];
allow-commands “(configure)”;
allow-configuration “(interfaces) | (routing-options) | (protocols)”;
Which two statements are true about the rescue configuration file? (Choose two.)
It must include a root password.
It is created by issuing request system configuration rescue save.
Which account is used to access a Junos device in factory-default configuration?
Root
You have been assigned the 66.96.130.0/24 network and need to segment it into at least 60
subnets.
Which network mask meets this requirement?
/30
What represents the binary equivalence of 96?
01100000
Which command will delete the current rescue configuration?
user@router> request system configuration rescue delete
— Exhibit –user@router> show route
inet.0: 9 destinations, 9 routes (9 active, 0 holddown, 0 hidden)
+ = Active Route, – = Last Active, * = Both
10.10.10.91/32 *[Direct/0] 00:09:40
> via lo0.0
10.10.10.92/32 *[OSPF/10] 00:01:50, metric 1
> to 172.16.1.2 via ge-0/0/2.0
100.100.1.0/24 *[Static/5] 00:01:50
Reject
172.16.1.0/24 *[Direct/0] 00:06:09
> via ge-0/0/2.0
172.16.1.1/32 *[Local/0] 00:06:09
Local via ge-0/0/2.0
192.168.0.0/16 *[Aggregate/130] 00:00:06
Reject
192.168.0.0/17 *[Aggregate/130] 00:00:06
> to 172.16.1.2 via ge-0/0/2.0
192.168.50.0/24 *[Static/5] 00:00:06
> to 172.16.1.2 via ge-0/0/2.0
192.168.51.0/24 *[Static/5] 00:00:06
> to 172.16.1.2 via ge-0/0/2.0
user@router> show configuration policy-options
policy-statement demo {
term 1 {
from {
protocol static;
route-filter 192.168.0.0/16 orlonger accept;
}
then accept;
}
}
user@router> show configuration protocols ospf
export demo;
area 0.0.0.0 {
interface ge-0/0/2.0;
}
— Exhibit –Given the configuration and routing table shown in the exhibit, which routes will be advertised to
OSPF neighbors because of the demo policy?
192.168.50.0/24 and 192.168.51.0/24
Which three protocols use UDP as a transport protocol by default? (Choose three.)
TFTP
DNS
SNMP
You have been asked to develop an application that uses only connection-oriented protocols.
Which two protocols can you use? (Choose two.)
PPP
TCP
What are three valid match criteria in a firewall filter applied to a Layer 3 interface? (Choose
three.)
ip address
protocol
port
Which command displays the amount of space available on the storage media?
Show system storage
What are two reasons why a route might be hidden? (Choose two.)
invalid next hop
routing policy
Which CLI keyboard sequence allows you to move the cursor to the beginning of the line?
Ctrl+a
Which command will display only direct routes?
show route protocol direct
You configured an interface with an IP address and committed the change. You then committed a
change that added an exception in a firewall filter to allow this network through the filter. You
realize that this work was done on the wrong router.
How do you undo all these changes?
roll back 2
What are three terminating actions for firewall filters? (Choose three.)
accept
discard
reject
Which three functions are available under the “Maintain” tab of J-Web? (Choose three.)
download and delete log files
reboot the system
view and add licenses
Which statement is true regarding the Junos OS?
All platforms running the Junos OS use the same source code base.
For the interface ge-1/2/3.4, what does the “ge” represent?
Gigabit Ethernet
Which two fields are found in an Ethernet frame header? (Choose two.)
checksum
type
Which statement is true about the forwarding table?
The forwarding table is stored in the control plane and in the forwarding plane.
You must segment your internal 192.168.1.0/24 network into a minimum of 12 subnets, each
containing a minimum of 12 hosts.
Which network mask do you use?
/28
Which two protocols use UDP as a transport protocol by default? (Choose two.)
DHCP
RIP
Your network administrator has asked you to view the real-time interface usage on ge-0/0/0.
Which command would be used?
Monitor interface ge-0/0/0
Which command do you use to show active alarms?
show system alarms
Which statement is true about the routing table?
The routing table exists in the control plane only.
What is the default route preference value for EBGP?
170
What are three benefits of class of service? (Choose three.)
It can prioritize latency-sensitive traffic.
It can control congestion.
It can allocate bandwidth for different classes of traffic.
Which two statements are true regarding trace options on Junos devices? (Choose two.)
You can see the contents of the log file by entering the showlog <filename> command.</filename>
The file name and a set of flags may be specified when enabling traceoptions.
What is the default protocol preference for OSPF internal routes?
10
Which two commands would you use to view OSPF routes? (Choose two.)
show route protocol ospf
show route
By default, which character indicates the UNIX shell prompt?
%
How do you save the current candidate configuration in the set format to permanent storage
media?
[edit] user@router# show | display set | save /var/tmp/current.conf
You have been asked to use a 23-bit network mask to segment the network block 209.18.12.0.
How many usable host addresses will there be per subnet?
510
You have been asked to use a 23-bit network mask to segment the network block 209.18.12.0.
How many usable host addresses will there be per subnet?
/var/home/user/
Which two statements are true about the primary address on an interface? (Choose two.)
It is the address used by default as the local address for broadcast and multicast packets
sourced locally and sent out of the interface
It can be useful for selecting the local address used for packets sent out of unnumbered
interfaces when multiple non-127 addresses are configured on the loopback interface.
What is the default export routing policy for EBGP?
Accept all active BGP routes.
What are the usable hosts on the 96.6.128.0/19 network?
96.6.128.1 through 96.6.159.254
What is an advantage of multiple software processes running in the Junos OS?
Each process has its own protected memory space.
What is the purpose of a network mask?
It is used to identify the network to which an IP address belongs.
What is the decimal equivalent of 00000110?
6
Which word starts a command to add configuration on a Junos device?
set
What are two valid match criteria for a routing policy? (Choose two.)
OSPF area ID
Prefix list
