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JN0-400
EX, Associate (JNCIA-EX)
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EX, Associate (JNCIA-EX) |
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| 認證編號 | Q&A | 更新 | 價格（美元） | |
JN0-400 |
104 Q&A | 2008-12-01 | $ 69 | |
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JN0-400:下载JN0-400考试题库演示部分（PDF格式）
JN0-400题库部分演示（DEMO）
1. Click the Exhibit button.
Why will the configurations in the exhibit fail to provide gateway redundancy between Switch-1 and Switch-2?
3 Switch-1:
interfaces {
ge-0/0/3 {
unit 0 {
family inet {
address 10.1.1.2/24 {
vrrp-group 100 {
virtual-address 10.1.1.1;
priority 110;
}
}
}
}
}
}
Switch-2:
interfaces {
vlan {
unit 100 {
family inet {
address 10.1.1.3/24 {
vrrp-group 200 {
virtual-address 10.1.1.1;
priority 90;
}
}
}
}
}
A.The IP addresses do not match.
B.The group numbers do not match.
C.The priority numbers do not match.
D.VRRP is not supported between a physical interface and a VLAN interface.
Answer: B
2. You are configuring the voice VLAN feature on an EX-series switch on interface ge-0/0/5.
Which configuration would you use?
A.ethernet-switching-options { voice-vlan { interface ge-0/0/5.0 { vlan voice-over-ip; forwarding-class expedited-forwarding; } }}
B.ethernet-switching-options { voip { interface ge-0/0/5.0 { member-vlan voice-over-ip; forwarding-class expedited-forwarding; } }}
C.ethernet-switching-options { voip { interface ge-0/0/5.0 { vlan voice-over-ip; forwarding-class expedited-forwarding; } }}
D.ethernet-switching-options { voice-vlan { interface ge-0/0/5.0 { member-vlan voice-over-ip; forwarding-class expedited-forwarding; } }}
Answer: C
3. Which two are included in the Ezsetup configuration for EX-series switches? (Choose two.)
A.Configure syslog servers.
B.Configure routing protocols.
C.Configure root authentication.
D.Configure me0 management Ethernet port.
Answer: CD
4. Within a virtual chassis, which type of switch maintains the forwarding table?
A.line card
B.master switch
C.routing switch
D.forwarding switch
Answer: B
5. On an EX-series switch, what information is gathered when building a bridge table? (Choose two.)
A.interface
B.IP address
C.MAC address
D.authentication information
Answer: AC
6. Which two statements describe the EX 3200 switches? (Choose two.)
A.The single-blower fan tray used for the EX 3200 switches is field replaceable.
B.The EX 3200 switches can be interconnected to form a single virtual chassis.
C.The redundant AC power supply units on the EX 3200 switches are hot swappable and load sharing.
D.The EX 3200 switches support either 4-port 1-Gigabit Ethernet or 2-port 10-Gigabit Ethernet uplink modules.
Answer: AD
7. Which two statements describe the EX 4200 switches? (Choose two.)
A.The fan tray used for the EX 4200 switches is not field replaceable.
B.The EX 4200 switches can be interconnected to form a single virtual chassis.
C.The EX 4200 switches support redundant load-sharing AC power supplies.
D.All EX 4200 switches support either partial or full Power over Ethernet (PoE) support.
Answer: BC
8. Which two major components make up the control and forwarding planes for an EX-series switch? (Choose two.)
A.Routing Engine
B.Switching Engine
C.Switching Fabric Module
D.Packet Forwarding Engine
Answer: AD
9. Which three functions are performed in the control plane? (Choose three.)
A.protocol updates
B.packet forwarding
C.system management
D.service implementation
E.forwarding table maintenance
Answer: ACE
10. Which statement regarding packet flow through an EX-series switch is correct?
A.Transit packets are processed by the Routing Engine.
B.The destination MAC address determines which lookup table is used.
C.The Routing Engine is consulted when processing both transit and host packets.
D.Routing protocol control packets are processed only by the Packet Forwarding Engine.
Answer: B
11. Which two statements regarding packet flow through an EX-series switch are correct? (Choose two.)
A.Transit packets are processed by the Routing Engine.
B.The destination MAC address determines which lookup table is used.
C.If the egress port belongs to the ingress Packet Forwarding Engine, the packet is switched locally.
D.If the egress port belongs to a remote Packet Forwarding Engine, the Routing Engine is consulted prior to forwarding the packet.
Answer: BC
12. What are two features of JUNOS software? (Choose two.)
A.JUNOS facilitates separate control and forwarding planes.
B.All processes use shared memory to make efficient use of available resources.
C.The functionality of JUNOS is made possible through multiple processes that are dependant on each other.
D.All processes run in their own protected memory space to prevent against complete system failure when a single process fails.
Answer: AD
13. What are two components of the JUNOS software architecture? (Choose two.)
A.multiple software processes
B.separation of control and forwarding planes
C.shared memory environment for all processes
D.efficient processing of all packets through the control plane
Answer: AB
14. Click the Exhibit button.
Given the configuration in the exhibit, which command would configure the IP address 10.10.10.1/24 for VLAN 2?
3 interfaces {
ge-0/0/0 {
unit 0 {
family ethernet-switching {
vlan {
members v2;
}
}
}
}
ge-0/0/1 {
unit 0 {
family ethernet-switching;
}
}
}
vlans {
v2 {
vlan-id 2;
interface {
ge-0/0/1.0;
}
l3-interface vlan.2;
}
}
A.set vlans v2 family inet address 10.10.10.1/24
B.set interfaces vlan v2 family inet address 10.10.10.1/24
C.set interfaces vlan unit 2 family inet address 10.10.10.1/24
D.set interfaces ge-0/0/1 unit 0 family inet address 10.10.10.1/24
Answer: C
15. You want to configure Layer 3 routing between two VLANs on a single EX-series switch.
In which configuration hierarchy would you configure the IP addresses for each VLAN?
A.[edit vlans]
B.[edit family inet]
C.[edit interfaces vlan]
D.[edit routing-options]
Answer: C
16. An EX-series switch has two routes for the same prefix: one that it received through OSPF and one that is a static route.
How will the switch choose a route to use for this prefix?
A.The switch will compare metrics and use the route with the lowest metric.
B.The switch will compare metrics and use the route with the highest metric.
C.The switch will compare route preferences and use the route with the highest route preference.
D.The switch will compare route preferences and use the route with the lowest route preference.
Answer: D
17. Which two statements are true about route preferences? (Choose two.)
A.Lower route preferences are more preferred.
B.Higher route preferences are more preferred.
C.Direct and local routes always have the best route preference.
D.Static routes are always more preferred than routes from dynamic routing protocols.
Answer: AC
18. You want to configure a static default route to the gateway 10.1.1.1.
Which set command will accomplish this task?
A.set routes static route 0.0.0.0/0 gateway 10.1.1.1
B.set protocols static route 0.0.0.0/0 next-hop 10.1.1.1
C.set family inet static route 0.0.0.0/0 next-hop 10.1.1.1
D.set routing-options static route 0.0.0.0/0 next-hop 10.1.1.1
Answer: D
19. You want to configure the JUNOS software to run OSPF on interfaces ge-0/0/1.0 and ge-0/0/2.0 and to place these two interfaces in Area 0.
Which command(s) will accomplish this task?
A.set protocols ospf interface ge-0/0/1.0 area 0.0.0.0set protocols ospf interface ge-0/0/2.0 area 0.0.0.0
B.set protocols ospf area 0.0.0.0 interface ge-0/0/1.0set protocols ospf area 0.0.0.0 interface ge-0/0/2.0
C.set protocols ospf area 0 interfaces [ge-0/0/1.0 ge-0/0/2.0]
D.set interfaces ge-0/0/1 unit 0 family inet ospf area 0.0.0.0set interfaces ge-0/0/2 unit 0 family inet ospf area 0.0.0.0
Answer: B
20. Which two statements are true regarding the Virtual Router Redundancy Protocol (VRRP)? (Choose two.)
A.The routers participating in VRRP elect a master router by choosing the router with the lowest priority.
B.The routers participating in VRRP all use the same virtual MAC address for a particular virtual IP address.
C.The routers participating in VRRP must share a common group ID to provide redundancy for the virtual IP addresses defined under that group.
D.The routers participating in VRRP always elect a common master on a network segment, rather than one master for each VRRP group configured on a network segment.
Answer: BC
21. Which command shows the VRRP status for all interfaces?
A.show vrrp
B.show route vrrp
C.show vrrp terse
D.show interfaces vrrp
Answer: A
22. Click the Exhibit button.
Which route would match the policy in the exhibit?
3 policy-statement foo {
term 1 {
from {
protocol ospf;
interface ge-0/0/0.0;
}
then accept;
}
}
A.any OSPF route
B.any route defined locally
C.routes learned using ge-0/0/0
D.OSPF routes learned using ge-0/0/0
Answer: D
23. What describes the way the JUNOS software evaluates a route against a policy?
A.The JUNOS software evaluates all terms in a policy sequentially. When it finds that the route matches all criteria specified in the from clause of a term, it applies the actions specified in the then clause and stops processing further terms.
B.The JUNOS software evaluates all terms in a policy sequentially. When it finds that the route matches any criteria specified in the from clause of a term, it applies the actions specified in the then clause and stops processing further terms.
C.The JUNOS software evaluates all terms in a policy sequentially. When it finds that the route matches all criteria specified in the match clause of a term, it applies the actions specified in the then clause and stops processing further terms.
D.The JUNOS software evaluates all terms in a policy sequentially. When it finds that the route matches all criteria specified in the from clause of a term, it applies the actions specified in the then clause and continues processing further terms if the accept action was specified.
Answer: A
24. Which two tasks can be accomplished through routing policies? (Choose two.)
A.Discard all TCP traffic.
B.Modify the metric of an OSPF route.
C.Advertise static routes through OSPF.
D.Advertise a default route to a single not-so-stubby OSPF area.
Answer: BC
25. What can be accomplished through routing policies?
A.Define a static default route.
B.Choose which routes to send to a RIP neighbor.
C.Choose which packets to accept from an upstream router.
D.Select a different next-hop for TCP packets than for all other IP packets.
Answer: B
26. You are configuring a switch that has three access ports in VLAN 3. There is also a routed VLAN interface assigned for VLAN 3. You want to define a firewall filter that will prevent TCP communication between two hosts on the VLAN. Both hosts are also on the same subnet.
Which two actions are required? (Choose two.)
A.You apply the firewall filter under the [edit vlans] hierarchy.
B.You apply the firewall filter under the [edit interfaces vlan] hierarchy.
C.You define the firewall filter under the [edit firewall family inet] hierarchy.
D.You define the firewall filter under the [edit firewall family ethernet-switching] hierarchy.
Answer: AD
27. Click the Exhibit button.
In the exhibit, in which configuration hierarchy would the block-stuff filter be defined?
[edit] user@switch# show vlans v2 { filter { input block-stuff; } }
A.[edit firewall family inet]
B.[edit firewall family vlan]
C.[edit firewall family ethernet]
D.[edit firewall family ethernet-switching]
Answer: D
28. Which two actions are available when configuring the MAC limiting feature? (Choose two.)
A.Drop the traffic.
B.Change the forwarding-class of the traffic.
C.Redirect the traffic with changed loss-priority.
D.Shut down the interface so traffic will be blocked.
Answer: AD
29. In EX-series switches, which attacks can the MAC limiting feature help to protect? (Choose two.)
A.MAC aging
B.MAC spoofing
C.MAC flooding
D.ARP poisoning
Answer: BC
30. Which two statements are correct regarding the DHCP snooping feature on EX-series switches? (Choose two.)
A.DHCP snooping forwards DHCPACK messages from DHCP servers on untrusted interfaces.
B.DHCP snooping drops DHCPOFFER messages from DHCP servers on untrusted interfaces.
C.DHCP snooping drops DHCPDISCOVER messages from DHCP clients on trusted interfaces.
D.DHCP snooping treats access ports as untrusted interfaces and trunk ports as trusted interfaces by default.
Answer: BD
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