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Q121.  (Topic 3) 

below on the spanning tree protocol described in the Blocking state error is 

A. Blocking ports that can receive BPDU packets 

B. Blocking ports that do not learn the source MAC address of the packet 

C. Blocking ports that do not forward data packets 

D. Blocking ports that do not receive any message 

Answer:


Q122.  (Topic 3) 

RSTP protocol when specifying the port in case of failure, () will be quickly converted to the new delay to the specified port is not forwarding state. 

A. Forwarding Port 

B. Alternate Port 

C. Backup Port 

D. Edge Port 

Answer:


Q123.  (Topic 3) 

The following statement is true on the virtual router is: 

A. number of routers in the same virtual router ID is the router configuration associated to the same virtual router; 

B. multiple routers in the same virtual IP address configuration means that the router associated to the same virtual router; 

C. If you want to associate more than one router to the same virtual router, virtual router ID and virtual IP address configuration must be identical; 

D. If you want to associate more than one router to the same virtual router, virtual router ID and at least one virtual IP address configured the same. 

Answer:


Q124.  (Topic 4) 

The following statement is true about the default route is (). 

A. The default route, also known as 

B. can only be manually configured by the administrator 

C. is a special kind of static route 

D. Dynamic routing protocols can also generate a default route 

Answer: A,D 


Q125.  (Topic 3) 

In the system view, is a port needs to be allocated to a particular VLAN, including the operation to be performed 

A. Create (or into) VLAN view 

B. to a VLAN broadcast storm suppression ratio 

C. for the specified VLAN or VLAN interface description string 

D. Ethernet port to a VLAN 

Answer: A,D 


Q126.  (Topic 3) 

In the frame relay network, the bandwidth of each virtual circuit for the control strategy is the correct description 

A. In the Tc, the amount of data transfer when the user is not greater than Bc, to continue receiving the frame transmission 

B. When the user data transmission is greater than Bc Bc and Be, but not greater than the sum, it will send more than frame the scope of Bc DE position "1" 

C. When the Tc in the user data transmission is greater than the sum of Bc and Be, the frame will exceed the scope of the DE position "1" 

D. When the Tc in the user data transmission is greater than the sum of Bc and Be, it will exceed the range of frames discarded 

Answer: A,B,D 


Q127.  (Topic 2) 

POP's full name is the Post Office Protocol, is used to receive e-mail, it uses the TCP () port 

A. 110 

B. 53 

C. 21 

D. 23 

Answer:


Q128.  (Topic 2) 

TFTP client to connect to the TFTP server, the target port is 

A. 20 

B. 21 

C. 53 

D. 69 

Answer:


Q129.  (Topic 1) 

: 132 

Similar to the OSI model, TCP / IP model uses the same hierarchical structure. TCP / IP model is divided into () a level. 

A. four 

B. five 

C. six 

D. seven 

Answer:


Q130.  (Topic 3) 

STP protocol packets spanning tree root bridge is elected based on comparison (). 

A. Bridge ID 

B. Path Cost 

C. Port Cost 

D. Port ID 

Answer:


Q131.  (Topic 1) 

: 131 

OSI reference model provides network services through the application process, providing inter-application communication is (). 

A. Data Link Layer 

B. session layer 

C. Network Layer 

D. Application layer 

Answer:


Q132.  (Topic 1) 

: 133 

TCP / IP model and OSI reference model, the difference is that TCP / IP to the OSI model () are included in the application layer. 

A. transport layer, presentation layer 

B. session layer, presentation layer 

C. transport layer, session layer 

D. presentation layer, application layer 

Answer:


Q133.  (Topic 4) 

Judge: PPP provides a point-to multi-protocol data packets transmitted on the standard method, is widely used point to point data link layer communication protocol. 

A. True 

B. False 

Answer:


Q134.  (Topic 3) 

About the advantages of the following statements is correct VLAN is (). 

A. VLAN on the switch by reducing the required number of physical ports to reduce network overhead 

B. VLAN by identifying the right to access to sensitive user data and applications to enhance network security 

C. VLAN and flow control by adjusting the window size to improve network performance 

D. VLAN network into smaller logical networks, which reduces the sensitivity of the network for broadcast storm 

Answer: B,D 


Q135.  (Topic 4) 

Judge: PPP protocol, CHAP authentication process requires three packets of the interaction. In order to match the request message and response message, the message contains Identifier field, a certification process used by the packet use the same Identifier information. 

A. True 

B. False 

Answer: