单选题How does a switch respond when it receives a message?（）A It reads the Layer-5 information and sends the message directly to the intended computer.B It reads the Media Access Control (MAC) address and broadcasts the message to all the computers that are
题目
It reads the Layer-5 information and sends the message directly to the intended computer.
It reads the Media Access Control (MAC) address and broadcasts the message to all the computers that are connected to the switch.
It reads the Media Access Control (MAC) address and sends the message directly to the intended computer.
It reads the Layer-5 information and broadcasts the message to all the computers that are connected to the switch.
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更多“单选题How does a switch respond when it receives a message?（）A It reads the Layer-5 information and sends the message directly to the intended computer.B It reads the Media Access Control (MAC) address and broadcasts the message to all the computers that are”相关问题
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第1题：
In BGP graceful restart, how does a peer router indicate the end of a route exchange?()A. an open message with the E bit set
B. an update message with the E bit set
C. an open message with an end-of-RIB marker
D. an update message with an end-of-RIB marker
参考答案：D
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第2题：
What does a router do?()A.Routes traffic down alternative paths and connects the local-area network (LAN) to the wide- area network (WAN)
B.Reads Media Access Control (MAC) addresses to forward messages to the correct location and connects the local-area network (LAN) to the wide-area network (WAN)
C.Stores data on the network and connects the local-area network (LAN) to the wide-area network (WAN)
D.Broadcasts data to all devices that are connected to it across the local-area network (LAN) and wide-area network (WAN)
参考答案：A
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第3题：
A router receives a packet from a neighbor with an MPLS shim header value of 0.What does the router do with this packet?（）
- A、It performs a label pop operation and an IP lookup.
- B、It performs a label swap operation and an IP lookup.
- C、It sends an error message toward the egress router.
- D、It sends an error message toward the ingress router.
正确答案:A -
第4题：
What does a router do?（）
- A、Routes traffic down alternative paths and connects the local-area network (LAN) to the wide- area network (WAN)
- B、Reads Media Access Control (MAC) addresses to forward messages to the correct location and connects the local-area network (LAN) to the wide-area network (WAN)
- C、Stores data on the network and connects the local-area network (LAN) to the wide-area network (WAN)
- D、Broadcasts data to all devices that are connected to it across the local-area network (LAN) and wide-area network (WAN)
正确答案:A -
第5题：
How does a switch respond when it receives a message?（）
- A、It reads the Layer-5 information and sends the message directly to the intended computer.
- B、It reads the Media Access Control (MAC) address and broadcasts the message to all the computers that are connected to the switch.
- C、It reads the Media Access Control (MAC) address and sends the message directly to the intended computer.
- D、It reads the Layer-5 information and broadcasts the message to all the computers that are connected to the switch.
正确答案:C -
第6题：
Which process occurs first during the Ethernet Discovery Stage process for a PPPoE service offering?（）
- A、The ERX router sends an Active Discovery Offer message.
- B、The ERX router sends an Active Discovery Initiation message.
- C、The customer device sends an Active Discovery Offer message.
- D、The customer device sends an Active Discovery Initiation message
正确答案:D -
第7题：
Which action does a BGP speaker take when it detects that the reset state bit is set in an openmessage?（）
- A、It tears down the BGP session.
- B、It sends a restart message to the peer.
- C、It marks all routes from that peer as stale.
- D、It sends a BGP refresh message to the peer
正确答案:C -
第8题：
单选题What does a Layer 2 switch do if it receives a frame with a destination MAC address that is not found in its MAC address table?（）AThe frame is dropped.
BThe frame is addressed with a broadcast MAC address and sent out all ports.
CThe frame is sent out all ports except the receiving port.
DAn ARP request is sent out all ports except the receiving port.
EA destination unreachable message is sent back to the source address.
FNone of the above.
正确答案： D解析： 暂无解析 -
第9题：
单选题In BGP graceful restart, how does a peer router indicate the end of a route exchange?（）Aan open message with the E bit set
Ban update message with the E bit set
Can open message with an end-of-RIB marker
Dan update message with an end-of-RIB marker
正确答案： A解析： 暂无解析 -
第10题：
单选题A Candidate RP receives a bootstrap message with a higher priority than its own. What happens?（）AUse highest IP address as BSR.
BReset the bootstrap timer and continue to listen.
CForward all traffic to the bootstrap message originator.
DDeclare self as BSR and send bootstrap messages every 60 seconds.
正确答案： D解析： 暂无解析 -
第11题：
单选题Which process occurs first during the Ethernet Discovery Stage process for a PPPoE service offering?（）AThe ERX router sends an Active Discovery Offer message.
BThe ERX router sends an Active Discovery Initiation message.
CThe customer device sends an Active Discovery Offer message.
DThe customer device sends an Active Discovery Initiation message
正确答案： D解析： 暂无解析 -
第12题：
单选题A router receives a packet from a neighbor with an MPLS shim header value of 0.What does the router do with this packet?（）AIt performs a label pop operation and an IP lookup.
BIt performs a label swap operation and an IP lookup.
CIt sends an error message toward the egress router.
DIt sends an error message toward the ingress router.
正确答案： C解析： 暂无解析 -
第13题：
In information theory, "information" is regarded as knowledge which reduces or removes(71) about the occurrence of a specific event from a given set of possible events. The concept "event" is to be understood as used in the theory of probability. For instance, an event may be the occurrence of a(72) character or word in a given message or in a given position of a message.In communication theory, channel is defined as that part of a communication system that connects the message source with the message sink. An encoder may be inserted between the message source and the input to the channel, and a(73) between the output of the channel and the message sink. Generally, these two units are not considered as being parts of the channel. In certain cases, however, they may be considered as pans of the message source and message sink,(74) In information theory(75) to Shannon, the channel can be characterized by the set of conditional probabilities of occurrence of all the messages received at the message sink when a given message emanates from the message source.
A．uncertainty
B．unreliability
C．randomness
D．inconsistency
正确答案：A
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第14题：
What does a Layer 2 switch do if it receives a frame with a destination MAC address that is not found in its MAC address table?()A. The frame is dropped.
B. The frame is addressed with a broadcast MAC address and sent out all ports.
C. The frame is sent out all ports except the receiving port.
D. An ARP request is sent out all ports except the receiving port.
E. A destination unreachable message is sent back to the source address.
F. None of the above.
参考答案：C
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第15题：
What keywords do you need to the access-list to provide to the logging message like source address and source mac address？（）
- A、Log
- B、Log-input
- C、Log-output
- D、Logging
正确答案:B -
第16题：
Regarding DHCP (dynamic host configuration protocol), which two of the following choices below are true?（）
- A、The DHCP Discover message uses FF-FF-FF-FF-FF as the Layer 2 destination address.
- B、The DHCP Discover message uses UDP as the transport layer protocol.
- C、The DHCP Discover message uses a special Layer 2 multicast address as the destination address.
- D、The DHCP Discover message uses TCP as the transport layer protocol.
- E、The DHCP Discover message does not use a Layer 2 destination address.
- F、The DHCP Discover message does not require a transport layer protocol.
正确答案:A,B -
第17题：
A user has been having difficulty with their PC. Which of the following is the BEST response atechnician should give when a user asks for the definition of a particular bluescreen message?（）
- A、“It is a message that informs the technician of what hardware needs to be replaced.”
- B、“A bluescreen message is just another name for an error.”
- C、“It provides the technician with more information about the problem.”
- D、“It is a complex message that is very difficult to explain to those who are not familiar with computers.”
正确答案:C -
第18题：
In BGP graceful restart, how does a peer router indicate the end of a route exchange?（）
- A、an open message with the E bit set
- B、an update message with the E bit set
- C、an open message with an end-of-RIB marker
- D、an update message with an end-of-RIB marker
正确答案:D -
第19题：
How are messages displayed when you use the SRW.MESSAGE packaged procedure? （）
- A、Dialogue box that implicitly determines report execution.
- B、Message line that implicitly determines report execution.
- C、Message line that suppresses the default oracle message.
- D、Dialogue box that does not terminate report execution.
- E、Dialogue box that suppresses the default oracle message.
正确答案:D -
第20题：
单选题What keywords do you need to the access-list to provide to the logging message like source address and source mac address？（）ALog
BLog-input
CLog-output
DLogging
正确答案： C解析： 暂无解析 -
第21题：
单选题How are messages displayed when you use the SRW.MESSAGE packaged procedure? （）ADialogue box that implicitly determines report execution.
BMessage line that implicitly determines report execution.
CMessage line that suppresses the default oracle message.
DDialogue box that does not terminate report execution.
EDialogue box that suppresses the default oracle message.
正确答案： D解析： 暂无解析 -
第22题：
单选题Which action does a BGP speaker take when it detects that the reset state bit is set in an openmessage?（）AIt tears down the BGP session.
BIt sends a restart message to the peer.
CIt marks all routes from that peer as stale.
DIt sends a BGP refresh message to the peer
正确答案： A解析： 暂无解析 -
第23题：
单选题A user has been having difficulty with their PC. Which of the following is the BEST response atechnician should give when a user asks for the definition of a particular bluescreen message?（）A“It is a message that informs the technician of what hardware needs to be replaced.”
B“A bluescreen message is just another name for an error.”
C“It provides the technician with more information about the problem.”
D“It is a complex message that is very difficult to explain to those who are not familiar with computers.”
正确答案： A解析： 暂无解析 -
第24题：
单选题How does a switch respond when it receives a message?（）AIt reads the Layer-5 information and sends the message directly to the intended computer.
BIt reads the Media Access Control (MAC) address and broadcasts the message to all the computers that are connected to the switch.
CIt reads the Media Access Control (MAC) address and sends the message directly to the intended computer.
DIt reads the Layer-5 information and broadcasts the message to all the computers that are connected to the switch.
正确答案： D解析： 暂无解析