Choose the best translation of “give him an A for effort” .

A . Designated port B . Nonswitch port C . Switch port D . Nonroot port E . Nondesignated port F . Root port

A . Following the traffic path B . Top-down C . Comparing configurations D . Bottom-up E . Divide and conquer F . Examine SLA

A .  offers a feature-rich implementation alternative to Wi-Fi certification B .  accelerates the availability of innovative features while maintaining interoperability C .  provides innovative features only on Cisco’s wireless client adapters D .  provides an evolving set of specifications for interoperability E .  eliminates the need for testing by providing innovative features to wireless client vendors through a one-time license fee

A . Problem report B . Problem collaboration C . Problem diagnosis D . Problem resolution E . Problem documentation F . Probiem authenticatio

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

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.

(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

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

(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

A．special B．strange C．important D．wrong

A．She’s very intelligent B．She’s very attractive C．She’s very easygoing D．She’s very special

A．ve r y often B．too often C．more often D．most often

A．fell B．jumped C．dashed D．wandered

（）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