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多选题 Which three of the following options are NOT fields found in an Ethernet frame?()

A

Version

B

Type

C

Source Port

D

Flags

E

Data

单选题 When a local loopback is activated on a PPP serial link, what indicates that the local interface is good?()

A

A ping to the local address succeeds.

B

A ping to the remote address succeeds.

C

A ping to the remote address received a 'TTL expired' message.

D

The interface shows a flag indicating that a loop is detected.

多选题 Which three statements describe the Transmission Control Protocol (TCP)?()

A

TCP is a transport layer protocol.

B

TCP is faster than the User Datagram Protocol (UDP).

C

TCP provides delivery notification and error checking mechanisms.

D

TCP uses a best effort delivery approach.

E

TCP application examples include HTTP and SMTP.

单选题 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.

单选题 You are the top of the hierarchy in configuration mode. How would you save your configuration to a file on the router?()

A

save configuration <filename>

B

save config <filename>

C

save <filename>

D

save run <filename>

单选题 How many IP addresses can be configured in a given interface?()

A

one primary and one secondary IP address

B

one IP address

C

as many IP addresses as you want

D

one primary and multiple secondary IP addresses

单选题 Which statement is correct about the validate option when upgrading JUNOS software?()

A

It will check the MD5 checksum of the install package.

B

It will check if the device meets the memory requirements for the install package.

C

It will check the compatibility of the configuration with the install  package.

D

It will check if the device meets the storage requirement  for the install package.

多选题 Which three statements are true regarding the Network Time Protocol (NTP) in JUNOS platforms?()

A

MD5 authentication is supported.

B

A client always synchronizes to a server even when the difference between the server clock and the local clock differs by a large amount.

C

JUNOS software can provide a primary time reference.

D

The boot-server configuration allows a router to synchronize its clock when it boots up, regardless of the offset between the NTP clock source and its internal clock.

E

It is useful to correlate timestamps on log files and other events for troubleshooting and forensics.

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