思科认证 2021_08_08 每日一练
A new switch is being installed in the Ezonexam network and you have been assigned the task of connecting it to an existing switch. In doing this, you want to set up the VLAN Trunking Protocol so that VLAN information can be passed between the switches. Which of the following must you do to accomplish this? (Choose all that apply).
A．You must set each end of the trunk line to IEEE 802.1e encapsulation.
B．You must set the same VTP management domain name on both switches.
C．You must set all ports on the two switches as access ports.
D．You must configure one of the switches as a VTP server.
E．You must use a rollover cable to connect the two switches.
You have a network that supports VLSM and you need to reduce IP address waste in your point to point WAN links. Which of the masks below would you use?
A. /38
B. /30
C. /27
D. /23
E. /18
F. /32
Which two statements describe the operation of the CSMA/CD access method, which is in use on the Ezonexam network? (Choose two)
A. After a collision, the station that detected the collision has first priority to resend the lost data.
B. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.
C. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.
D. The use of hubs to enlarge the size of collision domains is one way to improve the operation of the CSMA/CD access method.
E. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.
F. After a collision, all stations involved run an identical backoff algorithm and then synchronize with each other prior to transmitting data.
Ezonexam has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
A．VTP will allow physically redundant links while preventing switching loops
B．VTP will allow switches to share VLAN configuration information
C．VTP will allow a single port to carry information to more than one VLAN
D．VTP will allow for routing between VLANs
E．None of the above
Ezonexam is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions, the company needs to make sure that the phone traffic is on a different network from that of the office computer data traffic. What is the best network device to which to directly connect the phones and computers and what technology should be implemented on this device? (Choose two)
A. VLAN
B. Subinterface
C. STP
D. Hub
E. Switch
F. Router
G. Wireless Access Point
H. VTP
A.show license
B.show license feature
C.show license udi
D.show version
路由器上，命令“show int s0”的显示结果为：Serial0 is up,line protocol is down出现该结果的可能原因是（）
A.端口处于关闭状态
B.物理端口被烧毁
C.两端设备协议不一致
D.路由表中无路由