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2021 Sep JN0-102 answers
Q151. Which three protocols use UDP as a transport protocol by default? (Choose three.)
A. HTTP
B. TFTP
C. DNS
D. SNMP
E. SMTP
Answer: B,C,D
Q152. Which statement is true about the forwarding table?
A. The forwarding table is stored in the control plane only.
B. The forwarding table is stored in the control plane and in the forwarding plane.
C. The forwarding table contains both active and inactive routes.
D. The forwarding table can contain only a single next hop per destination.
Answer: B
Q153. What are two valid actions for a routing policy? (Choose two.)
A. discard
B. next policy
C. accept
D. ignore
Answer: B,C
Q154. Which command do you issue to upgrade the current software on Junos devices?
A. request system software replace
B. request system software install
C. request system software add
D. request system software upgrade
Answer: C
Q155. How do you save the current candidate configuration in the set format to permanent storage media?
A. [edit]
user@router# show | set | save /var/tmp/current.conf
B. [edit]
user@router# show | compare set | save /var/tmp/current.conf
C. [edit]
user@router# save /var/tmp/current.conf | display set
D. [edit]
user@router# show | display set | save /var/tmp/current.conf
Answer: D
Abreast of the times JN0-102 exam answers:
Q156. Which two prefixes would summarize the networks shown below? (Choose two.)
192.168.1.0/24 192.168.2.0/24 192.168.3.0/24
A. 192.168.0.0/23
B. 192.168.0.0/22
C. 192.168.0.0/24
D. 192.168.0.0/21
Answer: B,D
Q157. Which two characteristics describe the UDP protocol? (Choose two.)
A. limited error checking
B. defined timers
C. no recovery mechanisms
D. three-way handshake
Answer: A,C
Q158. What is the purpose of a network mask?
A. It is used in conjunction with the wildcard mask to determine the number of hosts on a network.
B. It is used to define which parts of the IP address are allocated to host addresses and network prefixes.
C. It is used to hide subnets from external networks by masking the subnets with NAT.
D. It is used to differentiate a network as a classful network or a classless network.
Answer: B
Q159. In dotted decimal notation, what is the equivalent of 11010101 01000010 01111111 11000010?
A. 213.66.127.194
B. 214.66.128.195
C. 212.64.143.194
D. 213.66.111.194
Answer: A
Q160. The IP address 192.168.100.1 belongs to which class of IP address space?
A. Class A
B. Class B
C. Class C
D. Class D
Answer: C