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下列（）不是Oracle Data Guard中的运行模式。
A . MAXIMI ZEPROTECTION
B . MAXIMI ZEPERFORMANCE
C . MAXIMI ZEAVAILABILITY
D . MAXIMI ZESTANDBY
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What is the purpose of the STP PortFast BPDU guard feature？（）
A . enforce the placement of the root bridge in the network
B . ensure that a port is transitioned to a forwarding state quickly if a BPDU is received
C . enforce the borders of an STP domain
D . ensure that any BPDUs received are forwarded into the STP domai
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Your ARPA has two guard zones.What is the purpose of the inner guard zone（）.
A . Alert the watch officer that a vessel is approaching the preset CPA limit
B . Warn of small targets that are initially detected closer than the outer guard zone
C . Guard against target loss during critical maneuvering situations
D . Sound an alarm for targets first detected within the zone
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What is true about IP Source Guard with port security？（）
A . Binding should be manually configured.
B . It is not supported if IEEE 802.1x port-based authentication is enabled.
C . The DHCP server must support option 82， or the client is not assigned an IP address.
D . It filters based on source IP address only.
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诺基亚GPRSBSC参数中，下列（）可以说明“GPRS Territory Update Guard Time”所表述的意思。
A . 设置PCU连续两次信道转换的最小间隔时间
B . 设置PCU连续三次信道转换的最小间隔时间
C . 该参数如果设置过小的话，容易引起话音信道和GPRS信道的频繁转换
D . 设置过大则不能及时实现动态GPRS与话音信道之间的转换
E . 设置过大则会降低无线资源的利用率
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What is the purpose of the STP PortFast BPDU guard feature？ （）
A . enforce the placement of the root bridge in the network
B . ensure that a port is transitioned to a forwarding state quickly if a BPDU is received
C . enforce the borders of an STP domain
D . ensure that any BPDUs received are forwarded into the STP domai
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Coast Guard approved buoyant work vests（）.
A . may be substituted for 10 percent of the required life preservers
B . should be stowed adjacent to lifeboats and emergency stations
C . may be used by boat crews and line handlers during lifeboat drills
D . should be used when carrying out duties near a weather deck's edge
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Which configuration is used to enable root guard？（）
A . interface gig3/1 spanning-tree guard root
B . interface gig3/1 spanning-tree root guard
C . interface gig3/1 spanning-tree root-guard
D . interface gig3/1 spanning-tree root-guard default
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Loop guard and UniDirectional Link Detection both protect against Layer 2 STP loops. In which two ways does loop guard differ from UDLD in loop detection and prevention？ （）
A . Loop guard can be used with root guard simultaneously on the same port on the same VLAN while UDLD cannot
B . UDLD protects against STP failures caused by cabling problems that create one-way links.
C . Loop guard detects and protects against duplicate packets being received and transmitted on different ports
D . UDLD protects against unidirectional cabling problems on copper and fiber media.
E . Loop guard protects against STP failures caused by problems that result in the loss of BPDUs from a designated switch port.
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That uniform makes the guards look absurd.
A . serious
B . ridiculous
C . beautiful
D . impressive
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Coast Guard regulations require a shipboard Oil Pollution Emergency Plan to be reviewed（）.
A . annually
B . once every two years
C . once every four years
D . once every five year
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Which two statements are true about BPDU port-guard and BPDU filtering？（）
A . BPDU port-guard can be enabled globally， whereas BPDU filtering must be enabled on a per-interface basis.
B . When globally enabled， BPDU port-guard and BPDU filtering apply only to PortFast enabled ports.
C . When globally enabled， BPDU port-guard and BPDU filtering apply only to trunking-enabled ports.
D . When a BPDU is received on a BPDU port-guard enabled port， the interface goes into the err-disabled state.
E . When a BPDU is received on a BPDU filtering enabled port， the interface goes into the err-disabled state.
F . When a BPDU is received on a BPDU filtering enabled port， the interface goes into the STP blocking state.
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Which of the following characteristics describe the BPDU Guard feature（）
A . ABPDU Guard port should only be configured on ports with PortFast enabled.
B . BPDU Guard and PortFast should not be enabled on the same port.
C . BPDU Guard is used to ensure that superior BPDUs are not received on a switch port.
D . ABPDU Guard port receiving a BPDU will go into err-disablestate.
E . ABPDU Guard port receiving a BPDU will be disabled.
F . BPDU Guard can be enabled on any switch port.
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Loop guard and UniDirectional Link Detection both protect against Layer 2 STP loops. In which two ways does loop guard differ from UDLD in loop detection and prevention？（）
A . Loop guard can be used with root guard simultaneously on the same port on the same VLAN while UDLD cannot.
B . UDLD protects against STP failures caused by cabling problems that create one-way links.
C . Loop guard detects and protects against duplicate packets being received and transmitted on different ports.
D . UDLD protects against unidirectional cabling problems on copper and fiber media.
E . Loop guard protects against STP failures caused by problems that result in the loss of BPDUs from a designated switch port.
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Switch R1 has been configured with the root guard feature. What statement is true if the spanning tree enhancement Root Guard is enabled？ （）
A . If BPDUs are not received on a non-designated port， the port is moved into the STP loop- inconsistent blocked state
B . IF BPDUs are received on a PortFast enabled port， the port is disabled.
C . If superior BPDUs are received on a designated port， the interface is placed into the root- inconsistent blocked state.
D . If inferior BPDUs are received on a root port， all blocked ports become alternate paths to the root bride.
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52. Your ARPA has two guard zones. What is the purpose of the inner guard zone?
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The security guards knew how to control the crowd.
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Where did Gandalf sacrificed himself to guard other fellowship? ____
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The security guard ( ) two men that were quarreling in the museum.
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They thought it desirable that an armed guard ____ in readiness.
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听力原文：The Coast Guard does what its name says; it guards the coasts of the United State
听力原文： The Coast Guard does what its name says; it guards the coasts of the United States. During a war, the Coast Guard becomes part of the United States Navy, and helps to protect against enemy attacks. In times of peace, however, The Coast Guard is part of the United States Department of Transportation. It has responsibility for many different duties. The Coast Guard can be found at many large lakes in America, as well as in coastal waters. It enforces laws controlling navigation, shipping, immigration, and fishing. It enforces other laws that affect the thousands of privately-owned boats in the United States. Coast Guard planes, boats and helicopters search for missing boats and rescue people in dangerous situations. Last year, Coast Guards men saved the lives of almost 7,000 people.
The Coast Guard does scientific research on the ocean. It also uses ice-breaking boats to clear ice from rivers or lakes, so boats can travel safely. One of The Coast Guard's most important duties now is helping to keep illegal drugs out of the United States. Coast Guard boats, armed with guns, use radios and radar to find boats that may be carrying drugs. They stop the boats suspected of carrying drugs and search them, They seize the drugs and arrest the people on the boats. Last year, Coast Guardsman seized more than 800,000 kilo grams of marijuana and cocaine. And-they arrested more than 700 persons trying to bring illegal drugs into the United States.
This kind of action is exiting. Most of the time, however, Coast Guardsman say they see nothing more exciting than the ocean.
(33)
A．Guarding the coasts of the United States.
B．Being part of the United States Navy.
C．Guiding people along the coast.
D．Protecting people from army attack.
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The presence of armed guards usfrom doing anything disruptive（).
A.excited
B.irritated
C.prevented
D.encourage
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United States Coast Guard does NOT require the life preserver to bemade_
A．with as few strings as possible
B．capable of being worn on both sides
C．according to each wearer s size
D．confortable and light to we ar
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That uniform makes the guards look<u>absurd.</u>（）
A．serious
B．ridiculous
C．beautiful
D．impressive
