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H3C Constructing Secure optimized WANs v2.0 Sample Questions:

1. In the EPCN network as shown in the figure , when sending data from CLT to users 1 , 2 , 3 , which of the following statements is correct?

A) CNU1 will receive packages 1 , 2 , and 3 and send them all to the end user 1
B) CNU1 will receive packets 1 , 2 , and 3 , but it will only send packet 1 to end user 1 , and discard packets 2 and 3
C) CNU1 will only receive package 1
D) terminating end user 1 will only receive the packet 1
E) terminating end user 1 receives packet 1 , 2 , 3 , but it accepts only the packet 1 , the packet is discarded 2 and packages 3

2. The ______ in the data packet can be used to distinguish data streams for access control.

A) advantage with the source / destination of the IP addresses
B) Lee with the source / destination port numbers
C) Lee with source / object MAC address
D) Lee with URL information

3. A secure network must meet the conditions of ______ .

A) There is an adequate security system when connecting to the internet
B) Have sufficient encryption and anti-counterfeiting means when transmitting data on the internet
C) determined users within the network access security and legal security
D) entire network has a sound management system

4. Which of the following descriptions about AH ( Authentication Head ) and ESP ( Encapsulating Security Payload ) are correct?

A) two who can provide data origin authentication and optional anti-replay service
B) AH cannot provide data integrity protection
C) two who can provide confidentiality protection
D) two can be used simultaneously

5. by the security gateway device displa ipsec sa command displays the following order information, the information is understood by ______ .
Interface: Serial0/2/1 path MTU: 1500
---------------- -------------
IPsec polic name: "1"
sequence number: 1
mode: isakmp
-----------------------------
connection id: 5
encapsulation mode: transport
perfect forward secrec: None
tunnel:
local address: 10.2.1.1
remote address: 10.2.1.2
Flow:
sour addr: 10.1.1.0/255.255.255.0 port: 0 protocol: IP
dest addr: 10.3.1.0/255.255.255.0 port: 0 protocol: IP
[inbound ESP SAs]
spi: 909448761 ( 0x36351639 )
proposal: ESP-ENCRPT-DES ESP-AUTH-MD5
sa remaining ke duration ( btes/sec ) : 1887435204/83
spi: 909448761 ( 0x36351639 )
proposal: ESP-ENCRPT-DES ESP-AUTH-MD5
sa remaining ke duration ( btes/sec ) : 1887435204/83
max received sequence-number: 19
udp encapsulation used for nat traversal: N
[outbound ESP SAs]
spi: 1583842120 ( 0x5e678348 )
proposal: ESP-ENCRPT-DES ESP-AUTH-MD5
sa remaining ke duration ( btes/sec ) : 1887435204/83
max sent sequence-number: 20
udp encapsulation used for nat traversal: N

A) This security policy work in tunnel mode
B) This security policy works in transmission mode
C) This security policy requires the use of IKE dynamic negotiation key, SPI , security protocol and algorithm and other parameters
D) This security policy requires manual configuration of parameters such as keys, SPI , security protocols and algorithms

Solutions: