IBM认证考试
Which ports must be left open if an administrator plans to perform Dynamic LPAR operations？（）A、 port 21（ftp）：tcp and port 657（rmc）：tcpB、 port 22（ssh）：tcp and port 657（rmc）：udpC、 port 657（rmc）：tcp and port 657（rmc）：udpD、 port 161（snmp）：tcp and port 161（snm
题目
Which ports must be left open if an administrator plans to perform Dynamic LPAR operations？（）
- A、 port 21（ftp）：tcp and port 657（rmc）：tcp
- B、 port 22（ssh）：tcp and port 657（rmc）：udp
- C、 port 657（rmc）：tcp and port 657（rmc）：udp
- D、 port 161（snmp）：tcp and port 161（snmp）：udp
参考答案和解析
相似问题和答案
第1题：
Free Radio Pratique will be granted by the Port Health Office in the following case ______ ．
A.Vessel with a case or suspected case of infectious disease on board
B.Vessel with a dead body on board
C.Vessel which has visited plague-infected ports during the current voyage
D.Cargo vessel which hasn't called at any plague infected ports during the current voyage and on which there is not any case of infectious disease，or any dead body
第2题：
Which combination of ports is available on the Cisco SPA 8800 voice gateway？（）
- A、 four station ports and four trunk ports （4xFXS and 4xFXO）
- B、 two station ports （2xFXS）
- C、 eight station ports （8xFXS）
- D、 one station port and one trunk port （1xFXS and 1xFXO）
正确答案:A
第3题：
Which of the following components must be elected before the Spanning Tree Protocol can converge in a switched LAN?
A. Designated ports.
B. Duplex operating mode.
C. Fast mode ports.
D. Root bridge.
E. Root ports.
F. BDPU priority.
A,D,E 解析：Explanation:
Designated port: Either a root port or a port that has been determined as having the best (lower) cost-a designated port will be marked as a forwarding port.
Root bridge: The root bridge is the bridge with the best bridge ID. With STP, the key is for all the switches in the network to elect a root bridge that becomes the focal point in the network. All other decisions in the network-like which port is to be blocked and which port is to be put in forwarding mode-are made from the perspective of this root bridge.
Root port: Always the link directly connected to the root bridge, or the shortest path to the root bridge. If more than one link connects to the root bridge, then a port cost is determined by checking the bandwidth of each link. The lowest cost port becomes the root port.
So these three components must be elected before the spanning tree protocol can converge in a switched LAN
第4题：
Which of the following ports is the default for HTTP?（）
- A、21
- B、25
- C、80
- D、110
正确答案:C
第5题：
In an environment in which multiple VLANs have been defined on Catalyst Express 500 switches， which two statements are correct for ports that have been configured with the Smartport role of "IP Phone + Desktop"？（）
- A、The names of the VLANs used by the SmartPorts are case insensitive
- B、The ports may belong to a configurable data VLAN
- C、The names of the VLANs used by the Smartports are not relevant
- D、The ports may belong to many VLANs， depending on how many PCs are connected to each port.
- E、The names of the VLANs used by the Smartports are case sensitive
正确答案:B,E
第6题：
The DAI feature has been implemented in the Company switched LAN. Which three statements are true about the dynamic ARP inspection （DAI） feature？ （）
- A、 DAI can be performed on ingress ports only.
- B、 DAI can be performed on both ingress and egress ports.
- C、 DAI is supported on access ports， trunk ports， EtherChannel ports， and private VLAN ports.
- D、 DAI should be enabled on the root switch for particular VLANs only in order to secure the ARP caches of hosts in the domain.
- E、 DAI should be configured on all access switch ports as untrusted and on all switch ports connected to other switches as trusted.
- F、 DAI is supported on access and trunk ports only.
正确答案:A,C,E
第7题：
Which of the following components must be elected before the Spanning Tree Protocol can converge in a switched LAN?（）
- A、designated ports.
- B、duplex operating mode.
- C、fast mode ports.
- D、root bridge.
- E、root ports.
- F、BDPU priority.
正确答案:A,D,E
第8题：
which ports do you often call at?
第9题：
When configuring unified ports on a 5548 switch， which port ordering must be respected？（）
- A、 Fibre Channel ports must be configured from the first port in the module.
- B、 Ethernet ports must be configured from the last port in the module.
- C、 Fibre Channel ports must be configured from the last port in the module.
- D、 Ethernet ports must be configured from the first port in the module.
正确答案:C,D
第10题：
Which of the following expansion ports can a server boot from？（）
- A、 AGP
- B、 USB
- C、 Serial
- D、 Parallel
正确答案:B