题目内容
（请给出正确答案）
[多选题]
ZXCTN device uses OSPF for monitoring. The three OSPF tables are （).
A.neighbor table
B.LSDB table
C.LSA
D. routing table
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.neighbor table
B.LSDB table
C.LSA
D. routing table
如果结果不匹配，请 联系老师 获取答案
更多“ZXCTN device uses OSPF for mon…”相关的问题
ame of().
ctory()is used to store version file. IMG
A．It uses nuclear energy.
B．It rests on a cushion of professional air.
C．It flies over magnetically activated tracks.
D．It uses a device similar to a jet engine.
A.Each line side interface (NNI) of ZXCTN equipment should be configured with EMS VLAN, and each VLAN should be configured with proper EMS IP;
B.ZXCTN6300/6200 support L3 routing protocol (e.g. OSPF). In 10GE ring, EMS info is forwarded through L3, and two adjacent ports on one link belong to one VLAN domain and one IP network segment;
C.After ZXCTN6100 device is upgraded into agent version, it is recommended to use L3 monitoring mode.
D.EMS VLAN ID range is in 3001～4093, and these VLAN values are automatically shielded on T31 to prevent collision between EMS VLAN and encapsulation VLAN;
Bluetooth
When you use computers, entertainment systems or telephones, the various pieces and parts of the systems make up a community of electronic devices. These devices communicate with each other using a variety of wires, cables, radio signals and infrared light(红外线) beams, and an even greater variety of connectors and plugs.
The art of connecting things is becoming more and more complex every day. And Bluetooth has now become a new popular method of connecting devices that can streamline the process. A Bluetooth connection is wireless and automatic, and it takes small-area networking to the next level by removing the need for user intervention and keeping transmission power extremely low to save battery power.
Bluetooth Operation
Bluetooth networking transmits data via 10w-power radio waves. It communicates on a frequency of 2.45 gigahertz(千兆赫)(actually between 2.402 GHz and 2.480 GHz, to be exact). This frequency band has been set aside by international agreement for the use of industrial, scientific and medical devices(ISM).
A number of devices that you may already use fake advantage of this same radio-frequency band. Baby monitors(微型监视器), garage-door openers and the newest generation of cordless phones all make use of frequencies in the ISM band.
One of the ways Bluetooth devices avoid interfering with other systems is by sending out very weak signals of about 1 milliwatt. By comparison, the most powerful cell phones can transmit a signal of 3 watts. The low power limits the range of a Bluetooth device to about 10 meters(32 feet), cutting the chances of interference between your computer system and your portable telephone or television. Even with the low power, Bluetooth doesn't require line of sight between communicating devices. The Walls in your house won't stop a Bluetooth signal, making the standard useful for controlling several devices in different rooms.
Bluetooth can connect up to eight devices simultaneously. With all of those devices in the same 10-meter(32-foot) radius; you might think they'd interfere with one another, but it's unlikely. Bluetooth uses a technique called spread-spectrum.(扩展频谱) frequency that makes it rare for more than one device to be transmitting on the same frequency at the same time. In this technique, a device will use. 79 individual, randomly chosen frequencies within a designated range, changing from one-to another on a regular basis. In the case of Bluetooth. the transmitters change frequencies 1,600 times every second, meaning that more devices can make full use of a limited slice of the radio spectrum. Since every Bluetooth transmitter uses spread-spectrum transmitting automatically, it's unlikely that two transmitters will be on the same frequency at the same time. This same technique minimizes the risk that portable phones or baby monitors will disrupt Bluetooth devices, since any interference on a particular frequency will last only a tiny fraction of a second.
Piconets(个人域网络)
Let's say you have a typical modern living room with the typical modern Stuff inside. There's an entertainment system with a stereo, a DVD player, a satellite TV receiver and a television; there's also a cordless telephone and a-personal computer. Each of these systems uses Bluetooth, and each forms its own piconet to talk between the main unit and peripheral(外围设备).
The cordless telephone has one Bluetooth transmitter in the base and another in the handset. The manufacturer has programmed each unit with an address that falls into a range of addresses it has established for a particular type of device. When the base is first turned on, it sends radio signals asking for a response from any units with an address in a particular range. Since the handset has an address in the range, it responds, and a tiny network is formed. Now, even if one of these device
A．Y
B．N
C．NG
Bluetooth
When you use computers, entertainment systems or telephones, the various pieces-and parts of the systems make up a community of electronic devices. These devices communicate with each other using a variety of wires, cables, radio signals and infrared light(红外线) beams, and an even greater variety of connectors and plugs.
The art of connecting things is becoming more and more complex every day. And Bluetooth has now become a new popular method of connecting devices that can streamline the process. A Bluetooth connection is wireless and automatic, and it takes small-area networking to the next level by removing the need for user intervention and keeping transmission power extremely low to save battery power.
Bluetooth Operation
Bluetooth networking transmits data via low-power radio waves. It communicates on a frequency of 2.45 gigahertz(千兆赫)(actually between 2.402 GHz and 2.480 GHz, to be exact). This frequency band has been set aside by international agreement for the use of industrial, scientific and medical devices(ISM).
A number of devices that you may already use take advantage of this same radio-frequency band. Baby monitors(微型监视器), garage-door openers and the newest generation of cordless phones all make use of frequencies in the ISM band.
One of the ways Bluetooth devices avoid interfering with other systems is by sending out very weak signals of about 1 milliwatt. By comparison, the most powerful cell phones can transmit a signal of 3 watts. The low power limits the range of a Bluetooth device to about 10 meters (32 feet), cutting the chances of interference between your computer system and your portable telephone or television. Even with the low power, Bluetooth doesn't require line of sight between communicating devices. The walls in your house won't stop a Bluetooth signal, making the standard useful for controlling several devices in different rooms.
Bluetooth can connect up to eight devices simultaneously. With all of those devices in the same 10-meter (32-foot) radius, you might think they'd interfere with one another, but it's un- likely. Bluetooth uses a technique called spread-spectrum(扩展频谱) frequency that makes it rare for more than one device to be transmitting on the same frequency at the same time. In this technique, a device will use 79 individual, randomly chosen frequencies within a designated range, changing from one to another on a regular basis. In the case of Bluetooth, the transmitters change frequencies 1,600 times every second, meaning that more devices can make full use of a limited slice of the radio spectrum. Since every Bluetooth transmitter uses spread-spectrum transmitting automatically, it's unlikely that two transmitters will be on the same frequency at the same time. This same technique minimizes the risk that portable phones or baby monitors will disrupt Bluetooth devices, since any interference on a particular frequency will last only a tiny fraction of a second.
Piconets(个人域网络)
Let's say you have a typical modern living room with the typical modern stuff inside. There's an entertainment system with a stereo, a DVD player, a satellite TV receiver and a television; there's also a cordless telephone and a personal computer. Each of these systems uses Bluetooth, and each forms its own piconet to talk between the main unit and peripheral(外围设备).
The cordless telephone has one Bluetooth transmitter in the base and another in the handset. The manufacturer has programmed each unit with an address that falls into a range of ad- dresses it has established for a particular type of device. When the base is first turned on, it sends radio signals asking for a response from any units with an address in a particular range. Since the handset has an address in the range, it responds, and a tiny network is formed. Now, even if one of these devices should receive a signal
A．Y
B．N
C．NG
听力原文： "High tech "and "state of the art" are two expressions that describe very modern technology. High tech is just a shorter way of saying high technology. And high technology describes any invention, system or device that uses the newest ideas or discoveries of science and engineering.
What is high tech？ A computer is high tech. So is a communications satellite. A modern manufacturing system is surely high tech.
High tech became a popular expression in the United States during the early 1980's. Because of improvements in technology, people could buy many new kinds of products in American stores, such as home computers, microwave ovens, etc.
"State of the art" is something that is as modern as possible. It is a product that is based on the very latest methods and technology. Something that is "state of the art" means the newest possible design or product of a business or industry. A state of the art television set, for example, uses the most modern electronic design and parts. It is the best that one can buy.
"State of the art" is not a new expression. Engineers have used it for years, to describe the best and most modern way of doing something.
Millions of Americans began to use the expression in the late 1970's. The reason was the computer revolution. Every computer company claimed that its computers were "state of the art".
Computer technology changed so fast that a state of the art computer today might be old tomorrow. The expression "state of the art" became as common and popular as computers themselves. Now all kinds of products are said to be "state of the art".
(30)
A．To tell what "high tech" and "state of the art" are.
B．To tell how "high tech" and "state of the art" have developed.
C．To give examples of high tech.
D．To describe the modern technology.
听力原文： "High tech" and "state of the art" are two expressions that describe very modern technology. High tech is just a shorter way of saying high technology. And high technology describes any invention, system or device that uses the newest ideas or discoveries of science and engineering.
What is high tech？ A computer is high tech. So is a communications satellite. A modern manufacturing system is surely high tech.
High tech became a popular expression in the United States during the early 1980's. Because of improvements in technology, people could buy many new kinds of products in American stores, such as home computers, microwave ovens, etc.
"State of the art" is something that is as modem as possible. It is a product that is based on the very latest methods and technology. Something that is "state of the art" means the newest possible design or product of a business or industry. A state of the art television set, for example, uses the most modern electronic design and parts. It is the best that one can buy.
"State of the art" is not a new expression. Engineers have used it for years, to describe the best and most modem way of doing something.
Millions of Americans began to use the expression in the late 1970's. The reason was the computer revolution. Every computer company claimed that its computers were "state of the art".
Computer technology changed so fast that a state of the art computer today might be old tomorrow. The expression "state of the art" became as common and popular as computers themselves. Now all kinds of products are said to be "state of the art".
(30)
A．To tell what "high tech" and "state of the art" are.
B．To tell how "high tech" and "state of the art" have developed.
C．To give examples of high tech.
D．To describe the modern technology.
听力原文：M: I'm sorry I'm late.Rose.
W: That's all right,Vic.My house isn't that easy to find.Many of my friends have trouble finding the way when they come for the first time.But you know,you wouldn't have gotten lost if you had a"smart"car.
M: A smart car？I have never heard of that before.What's a smart car？
W: I just read a magazine article about some new technology that can make a car smart.One device is a computerized map display and a synthesized voice,you must enter the address where you want to go,and the voice tells you how to get there,street by street.
M: Hey,that's just like my brother.He never gets lost,and he's always telling me the best route.So what else will a smart car be able to do？
W: Well,the article said that they will be equipped with radar warning systems that will warn drivers if they're getting too close to other cars with an alarm signal,and they will even put on the brakes if the drivers don't.
M: Tell me,Rose,will these cars be smart enough to fill themselves up with gas？
W: Not that I know of.Why do you ask？
M: Well,I'm not late because I got lost--I'm late because I ran out of gas on the way over here.
What do we learn about a"smart"car according to the woman？
A．It uses new technology.
B．It is installed with a robot.
C．It is as clever as human.
D．It can talk with people.
