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Which of the following is not considered a common approach to narrow the field of potentialproblem causes？ （Choose the best answer.）（）
A . Following the traffic path
B . Top-down
C . Comparing configurations
D . Bottom-up
E . Divide and conquer
F . Examine SLA
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Which of the following procedures are involved in the recommended three-step troubleshootingflow？（Choose the best three answers.）（）
A . Problem report
B . Problem collaboration
C . Problem diagnosis
D . Problem resolution
E . Problem documentation
F . Probiem authenticatio
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In what situation would the command ip helper-address be required？（Choose the best answer.）（）
A . Only when there is a duplicate IP address caused by a combination of static and dynamic IPaddress allocations
B . On each router that exists between the client and the server
C . Only when a router separates the client from the server
D . Only if the DHCP sever issues a DHCPNAK to the initial request
E . Only when the client is on the same subnet as the server
F . Only when the DHCP pool is out of IP addresse
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Listend to the conversation. Then choose the best answer to each question below.Where is Henry from?
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Listen to the conversation about eating out and choose the best answer to each of the following questions.Why don't they choose to go to the French restaurant?
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Listen to the news report and choose the best answer to each question you hear.
A、Because the roads were damaged.
B、Because the bridges were damaged.
C、Because the communication systems were damaged.
D、Because the villagers were in a rural mountainous area.
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Long ConversationDirections: Listen to a long conversation and choose the best answer to each question you hear.1.
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Listen to the conversations one and choose the best answer to each of the following questions. Question 1 to 4 are based on the conversation you have just heard.
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Watch the Conversation in 5.1 again and choose the best answer;Kate’s advice is to ______.
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Choose the best answer from the options below to complete the following sentence. Law firms and accounting firms can provide ________.
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Section AListen to the questions and choose the best answer to each of them.B
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Task 3 Anna is phoning Mr. Brown for an appointment. Listen to the conversation and choose the best answer to each question you hear.
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Please choose the best answer about “head office”.
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Choose the best answer for each question according to the information you hear.I think about her _______.
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Choose the best answer for each question.1. When is his birthday?
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Section AListen to the conversation. Then choose the best answer to complete each sentence.Fred has a ________.
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For each blank，choose the best answer from the four choices and write down on the answer sheet．
(66) is a protocol that a host uses to inform. a router when it joins or leaves an Internet multicast group．
(67) is an error detection code that most data communication networks use．
(68) is an interior gateway protocol that uses a distance vector algorithm to propagate routing information．
(69) is a transfer mode in which all types of information are organized into fixed form. cells on an asynchronous or non -periodic basis over a range of media.
(70) is an identifier of a web page.
A．SMTP
B．ICMP
C．RARP
D．IGMP
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In the following essay, each blank has four choices. Choose the best answer and write-down on the answer sheet.
Microwave communication uses high-frequency(71)waves that travel in straightlines through the air. Because the waves cannot(72)with the curvature of the earth, they can be(73)only over short distance. Thus, microwave is a good(74)for sending data between buildings in a city or on a large college campus. For longer distances, the waves must be relayed by means of "dishes" or(75). These can be installed on towers, highbuildings, and mountain tops.
A．optical
B．radio
C．electrical
D．magnetic
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For each blank, choose the best answer from the four choices and write down on the answer sheet.
(66) is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.
(67) is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols.
(68) functions with two layers of protocols. It Can connect networks of different speeds and can be adapted to an environment as it expands.
(69) is the popular LAN developed under the direction of the IEEE 802.5.
(70) is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.
A．The MAC address
B．The IP address
C．The subnet address
D．The virtual address
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Task3: Choose the best answer and complete the passage （）
A．special
B．strange
C．important
D．wrong
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Watch the Conversation in 5.1 again and choose the best answer;Mark wants to get to kno
A．She’s very intelligent
B．She’s very attractive
C．She’s very easygoing
D．She’s very special
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Listen again and choose the best answer to each of the following questions. [音频] Which of the following statements is NOT correct when describing Robert？
A．He has his own idea about his future jo
B．He is interested in his parents’ careers．
C．He thinks Peter is not old enough to make his own decisions．
D．He is interested in the work itself rather than the money he will earn．
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For each blank，choose the best answer from the four choices and write down on the answer sheet.
（）is a six bytes OSI layer 2 address which is burned into every networking device that provides its
A、 The hub
B、 The bridge
C、 The router
D、 The proxy
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Directions: There are ten incomplete sentences in this part. For each sentence, there are four choices marked A, B, C, and D. Read them and choose the best answer. Then write your answer on the Answer
A．the 1980s
B．1980s
C．1988s
D．the 1988
