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Q256.  (Topic 2) 

Frequently used data network debugging Tracert, in its working mechanism, the total use of () kind of ICMP packets. 

A. 2 

B. 3 

C. 4 

D. 6 

Answer:


Q257.  (Topic 1) 

: 54 

In which the network topology, a link failure will cause all traffic disruption 

A. Mesh 

B. Bus 

C. Star 

D. Tree 

Answer:


Q258.  (Topic 2) 

Using the IP address 125.3.54.56 natural mask of the network address is 

A. 125.0.0.0 

B. 125.3.0.0 

C. 125.3.54.0 

D. 125.3.54.32 

Answer:


Q259.  (Topic 2) 

The following statement on the correct route aggregation is 

A. routing aggregation technology can only address the hierarchical structure of the system to use, the address for the planar structure is not 

B. routing aggregation technology can be an organization for all IP addresses as a routing routing convergence routing tables thus reducing the number of routing entries 

C. External routing aggregation technology can be screened subnet topology change within the 

D. Dynamic routing aggregation can be a dynamic routing protocol implementation, but a variety of different dynamic routing protocols for route summarization is not the same degree of support 

Answer: A,B,C,D 


Q260.  (Topic 1) 

: 79 

ADSL, VDSL can be used as the encoding (). 

A. CAP 

B. DMT 

C. DWMT 

D. SLC 

Answer: A,B 


Q261.  (Topic 2) 

() Is used to check whether the IP network connections and hosts up to the most common method. Such as a router between the host and the connectivity between the router problems can use it to judge. 

A. DNS 

B. FTP 

C. PING 

D. TFTP 

Answer:


Q262.  (Topic 1) 

: 77 

The following is a correct description of ADSL 

A. asymmetric uplink and downlink transmission speed of DSL technology 

B. downlink transmission rate symmetric DSL technology 

C. uplink downlink rate can be larger than the rate 

D. downlink rate than upstream rate can be large 

Answer: A,D 


Q263.  (Topic 4) 

Judge: VC switching refers to the exchange process only change the VCI value, pass-through VPI value. The VP exchange process VPI, VCI has changed. 

A. True 

B. False 

Answer:


Q264.  (Topic 1) 

: 188 

LLC header consists of three parts, namely, 

A. SSAP 

B. DSAP 

C. Address 

D. Control 

Answer: A,B,D 


Q265.  (Topic 2) 

TRACERT process, the agreement will not be used is (). 

A. TCP 

B. UDP 

C. ICMP 

D. ARP 

Answer: A,D 


Q266.  (Topic 2) 

IP address 192.168.1.7 with natural mask, its network address (). 

A. 192.168.1.0 

B. 192.168.1.4 

C. 192.0.0.0 

D. 192.168.0.0 

Answer:


Q267.  (Topic 2) 

Assuming that the IP address 190.5.6.1, subnet mask 255.255.252.0, then the IP address where the segment and subnet broadcast address are 

A. 190.5.4.0 190.5.7.255 

B. 190.5.4.0 190.5.4.255 

C. 190.5.4.0 190.5.4.254 

D. 190.5.1.0 190.5.1.255 

Answer:


Q268.  (Topic 1) 

: 73 

VPN can be divided according to achieve the level (). 

A. L2VPN 

B. L3VPN 

C. VPDN 

D. GRE VPN 

Answer: A,B,C 


Q269.  (Topic 4) 

PPP connection is established, you can use which protocol component Echo-Request and Echo-Reply message packet detect link status (). 

A. Data Package 

B. LCP 

C. NCP 

D. IPCP 

Answer:


Q270.  (Topic 1) 

: 197 

ICMP packets to pass the test (). 

A. ICMP packet inspection and field 

B. IP packet header inspection and 

C. ICMP message code field 

D. ICMP message type field 

Answer: