思科认证考试
Which statement is true when ICMP echo and echo-reply are disabled on edge devices？（）A、Pings are allowed only to specific devices.B、CDP information is not exchanged.C、Port scans can no longer be run.D、Some network diagnostic data is lost.E、Wireless device
题目
Which statement is true when ICMP echo and echo-reply are disabled on edge devices？（）
- A、Pings are allowed only to specific devices.
- B、CDP information is not exchanged.
- C、Port scans can no longer be run.
- D、Some network diagnostic data is lost.
- E、Wireless devices need to be physically connected to the edge device.
- F、OSPF routing needs the command ip ospf network non-broadcast enabled.
参考答案和解析
相似问题和答案
第1题：
A.Traceroute transmits ICMP echo-request packets.
B.Traceroute transmits UDP packets.
C.Traceroute receives ICMP echo-reply packets.
D.Traceroute receives ICMP port-unreachable packets.
第2题：
A. It uses SNMP v1.
B. It scans devices for hardware information.
C. It scans and records the operational status of devices.
D. When the configuration of a device changes, the inventory is automatically updated.
第3题：
A. The ADR base keeps all diagnostic information in binary format
B. SQL*Plus provides the ADRI script, which can be used to work with ADR
C. The ADR can be used for problem diagnosis only when the database is open
D. The ADR can be disabled by settting the DIAGNOSTIC_DEST parameter to null
E. The ADR can be used for problem diagnosis even when the database instance is down
F. The ADR base is shared across multiple instances
第4题：
The proper safety guidelines for handling any device specific consumables can be found in which of the following documentation？（）
- A、Material Safety Data Sheets
- B、Installation Guides
- C、Consumer Reports
- D、Devices Parts Catalog
正确答案:A
第5题：
Which two statements about the Wireless Location Appliance are true？ （）
- A、 A Wireless Location Appliance acts as a server to one or more Cisco WCSs. It collects， stores， and passes on data from its associated Cisco WLAN controllers.
- B、 Before using the Web interface， the initial configuration of the Wireless Location appliance must be done using the command-line interface （CLI）.
- C、 The Cisco 2000， 2700， 4100， and 4400 are examples of Wireless Location Appliances.
- D、 The Wireless Location Appliance visually displays the location information of WLAN devices and forwards this information to third-party applications using the Simple Network Management Protocol （SNMP）.
- E、 The Wireless Location Appliance visually tracks up to 15，000 WLAN devices and can store this information for 90 days.
正确答案:A,B
第6题：
With regard to Ethernet media access methods, which of the following are true?
(Choose all that apply.)
A．A device waits for an electronic signal before transmitting.
B．A device listens and waits until the media is not busy before transmitting.
C．All devices on an Ethernet segment see data that passes on the network medium.
D．Only the sender and the receiver devices see data that passes on the network medium.
E．Ethernet networks allow you to configured devises with higher transmission priority.
解析：Explanation:
Ethernet uses the CSMA/CD access method.
CSMA/CD logic helps prevent collisions and also defines how to act when a collision does occur. The CSMA/CD algorithm words like this:
1. A device with a frame. to send listens until the Ethernet is not busy.
2. When the Ethernet is not busy, the sender begins sending the frame.
3. The sender listens to make sure that no collision occurred.
4. Once the senders hear the collision, they each send a jamming signal, to ensure that all stations recognize the collision.
5. After the jamming is complete, each sender randomizes a timer and waits that long.
6 When each timer expires, the process starts over with Step 1.
So, all devices on the Ethernet need to use CSMA/CD to avoid collisions and to recover when inadvertent collisions occur.
第7题：
Refer to the exhibit. The two exhibit devices are the only Cisco devices on the network. The serial network between the two devices has a mask of 255.255.255.252. Given the output that is shown, what three statements are true of these devices? （）
A.The Manchester serial address is 10.1.1.1
B.The Manchester serial address is 10.1.1.2
C.这个Manchester路由器串口地址为：10.1.12
D.The London router is a Cisco 2610.
E.The Manchester router is a Cisco 2610.
F.The CDP information was received on port Serial0/0 of the Manchester router.
G.The CDP information was sent by port Serial0/0 of the London Router.
第8题：
A. Traffic addressed to the chassis that requires some form of special handling by the RE before it can be forwarded out an egress port.
B. Traffic that enters an ingress port, is compared against the forwarding table, and is forwarded out an egress port.
C. Any traffic that requires the generation of an ICMP message.
D. Traffic that requires some form of special attention and does not pass through the device.
第9题：
ISL is being configured on a Company switch. Which of the following choices are true regarding the ISL protocol？ （）
- A、 It can be used between Cisco and non-Cisco switch devices.
- B、 It calculates a new CRC field on top of the existing CRC field.
- C、 It adds 4 bytes of protocol-specific information to the original Ethernet frame.
- D、 It adds 30 bytes of protocol-specific information to the original Ethernet frame.
正确答案:B,D
第10题：
Which statement is true regarding proxy ARP？（）
- A、Proxy ARP is enabled by default on stand-alone JUNOS security devices.
- B、Proxy ARP is enabled by default on chassis clusters.
- C、JUNOS security devices can forward ARP requests to a remote device when proxy ARP is enabled.
- D、JUNOS security devices can reply to ARP requests intended for a remote device when proxy ARP is enabled
正确答案:D