JN0-100章节练习(2020.05.11)

多项选择题
Which two statements are true regarding an Ethernet collision domain?（）
A.If a switch is used, the collision domain includes all devices connected to the switch.
B.If a hub is used, the collision domain includes all devices connected to the hub.
C.If a hub is used, the collision domain is limited to each device and the hub.
D.If a switch is used, the collision domain is limited to each device and the switch.
单项选择题
After issuing the show interfaces terse command, you notice that the status of one interface is "up down". What does this indicate?"（）
A.Layer 1 on the interface is up but Layer 2 is down.
B.Layer 2 on the interface is up but Layer 3 has not been configured.
C.The interface is administratively up but the link status is down.
D.The interface is up but has been administratively turned off.
多项选择题
Which two protocols are connection-oriented?（）
A.Ethernet
B.PPP
C.TCP
D.UDP
单项选择题
A router has been configured with the settings shown below:[edit]user@host# show system authentication-order authentication-order [ radius tacplus ];The router also has a local database that contains the user lab with password lab123. What would happen if both the RADIUS and the TACACS servers are not accessible?（）
A.The user lab will not be able to login.
B.The user lab will be authenticated against the local database and will be able to login.
C.The user lab will receive an error message indicating the router is unable to authenticate due to the authentication servers not responding.
D.The user will be able to login only if tries to login as the root user.
单项选择题
What is the default local location for syslog and trace files?（）
A./log
B./home/log
C./var/log
D./etc/log
单项选择题
How are the commands a user is allowed to enter defined in JUNOS?（）
A.Permissions are configured individually for each user.
B.Users are associated with user classes, and each class defines the permissions for entering commands.
C.There are four default classes with different permissions and you can only use these four.
D.Permissions are associated with each user ID
单项选择题
Which type of traffic will cause Policed Discards errors on an interface on a JUNOS device?（）
A.Traffic that does not match any route in the forwarding table.
B.Traffic that exceeds the bandwidth of the interface.
C.Traffic of unsupported protocols on that interface.
D.Traffic arriving on unknown virtual-circuits on that interface.
单项选择题
You are the network administrator setting up the IP network for a new branch office. You need at least 5 networks with 25 hosts each. You have been allocated a /24 network.Which prefix length will satisfy the given requirements?（）
A./24
B./26
C./27
D./28
多项选择题
Which two loopback types are supported for serial interfaces on Juniper devices?（）
A.Local
B.Far End
C.Remote
D.Bidirectional
单项选择题
Which command allows you to view interface usage details in real-time?（）
A.user@host> debug interface interface-name
B.user@host> monitor usage interface-name
C.user@host> monitor interface interface-name
D.user@host> traceoptions interface interface-name