CCIE系列认证
单选题What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SM operations？（）A immediately after receiving the first packet on the shared tree for a given （S，G）B after receiving over 1 kb/s traffic onthe sh
题目
immediately after receiving the first packet on the shared tree for a given （S，G）
after receiving over 1 kb/s traffic onthe shared tree for a given （S，G）
10 seconds after receiving the first packet on the shared tree for a given （S，G）
30 seconds after receiving the first packet on the shared tree for a given （S，G）
after receiving over 10 kb/s traffic onthe shared tree for a given （S，G）
相似问题和答案
第1题：
If XYZ LTD needs to upgrade the Cisco IOS Software of a Cisco Router, Where is the best place to download the upgrade image file from?（）
- A、The best option is to download it from the Cisco TAC website
- B、The best option is to download it from the Cisco.Com Software support site
- C、The best option is to download it form the Cisco Advanced Services website
- D、The best option is to download it from the TFTP site on Cisco.com
正确答案:B
第2题：
What type of services are provided by the Cisco IOS gateways in a VoIP network with Cisco CallManager functionality？ （）
- A、Cisco IOS gateways provide services such as address translation and network access control for the devices on the networl
- B、Cisco IOS gateways provide services such as bandwidth management and accounting
- C、Cisco IOS gateways provide media termination and signal translation between the public switched telephone network （PSTN） and IP networks
- D、Cisco IOS gateways provide zone management for all registered endpoints in the network
正确答案:C
第3题：
A.Router1 has specific boot system command that instruct it to load IOS from TFTP server.
B.Router1 is acting as a TFTP server for other routers.
C.Router1 cannot locate a valid IOS image in flash memory.
D.Router1 defaulted to ROMMON mode and loaded the IOS image from a TFTP server.
E.Cisco routers will first attempt to load a image from TFTP for management purposes.
第4题：
What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SM operations？（）
- A、immediately after receiving the first packet on the shared tree for a given （S，G）
- B、after receiving over 1 kb/s traffic onthe shared tree for a given （S，G）
- C、10 seconds after receiving the first packet on the shared tree for a given （S，G）
- D、30 seconds after receiving the first packet on the shared tree for a given （S，G）
- E、after receiving over 10 kb/s traffic onthe shared tree for a given （S，G）
正确答案:A
第5题：
What are two security features of the Cisco Secure Router 500 Series？ （）
- A、Cisco Intrusion Prevention System
- B、Cisco IOS Software Firewall
- C、Cisco IOS Easy VPN
- D、Cisco Unified Wireless Networking
- E、Cisco ASA Hardware Firewall
正确答案:A,B
第6题：
Which of the following is true about the Cisco IOS-IPS functionality？ （）
- A、 The signatures available are built into the IOS code.
- B、 Toupdate signatures youneed to install a new IOS image
- C、 To activate new signatures you download a new Signature DefiitionFile （SDF） from Cisco’s web site
- D、 Loading and enabling selected IPS signatures is user configurable
- E、 Cisco IOS onlyprovides Intrusion Detection functionality
- F、 Cisco IOS-IPS requires a network module installed in your router running sensor software
正确答案:C,D
第7题：
What is a requirement to enable Cisco IOS IPS with 5.x signature？（）
- A、disable Zone-Based Firewall as the two features are not compatible
- B、disable Cisco Express Forwarding as the two features are not compatible
- C、generate a certificate and export on Cisco.com to receive a signature update
- D、import the public RSA key from the Cisco IPS team that allows the router to verify that a signatureupdate （which was signed by this key） comes from Cisco
正确答案:D
第8题：
Which two of these statements correctly describe classic PIM-SM？（）
- A、The IOS default is for a last-hop router to trigger a switch to the shortest path tree as soon as a new source is detected on the shared tree.
- B、The IOS default is for every one of the routers on the shared tree to trigger a switch to the shortest path tree as soon as a new source is detected on the shared tree.
- C、The default behavior of switching to the shortest path tree as soon as a new source is detected on the shared tree can be disabled by setting the value in the ip pim spt-threshold command to "infinity."
- D、The default behavior of switching to the shortest path tree as soon as a new source is detected on the shared tree can be disabled by setting the value in the ip pim spt-threshold command to "zero."
正确答案:A,C
第9题：
What tasks can only be performed in the default or admin VDC？（）
- A、 EPLD upgrade， IOS ISSU， FCoE feature enablement， CoPP configuration， and rolling back a checkpoint
- B、 EPLD upgrade， Cisco IOS ISSU， FCoE feature enablement， CoPP configuration， and ACL capture enablement
- C、 EPLD upgrade， Cisco IOS ISSU， FCoE feature enablement， CoPP configuration and SNMP configuration
- D、 EPLD upgrade， Cisco IOS ISSU， FCoE feature enablement， CoPP configuration， and write erase
正确答案:B
第10题：
Which three of the following basic network services are provided by the Cisco IOS?（）
- A、Defines the network topology
- B、Access to network resources
- C、Routing and switching functions
- D、Content Filtering
- E、Intrusion Detection
正确答案:A,B,C