In the Ezonexam switched LAN environment, what does the IEEE 802.1Q standard describe？A. V

A Ezonexam PC has the IP address 172.16.209.10 /22. What is the subnet of this address？

A．172.16.42.0

B．172.16.107.0

C．172.16.208.0

D．172.16.252.0

E．172.16.254.0

当处理一个问题时的循环次数已知时，最好采用()语句来解决。

A. for

B. while

c. do-while

D. switch

有以下程序： #include ＜iostream＞ using namespace Std； int main() { int a = 15，b = 21，m = 0； switch(a%3) { case 0： m++； break； case 1： m++； switch(b%2) {

A．1

B．2

C．3

D．4

ched network？ (Select all that apply)

A．Create the VLAN.

B．Name the VLAN.

C．Configure an IP address for the VLAN.

D．Add the desired ports to the new VLAN.

E．Add the VLAN to the VTP domain.

在Cisco Catalyst 3548以太网交换机上建立一个名为lib105的VLAN，下列正确的配置是______。

A) Switch-3548#vlan 1 name lib 105

Switch-3548#exit

B) Switch-3548(vlan)#vlan 1 name lib 105

Switch-3 548(vlan)#exit

C) Switch-3548(vlan)#vlan 1000 name lib 105

Switch3548(vlan)#exit

D) Swimh-3548(vlan)#vlan 1002 name lib 105

Switch-3548(vlan)#exit

Which of the following need to be completed for the creation of this new VLAN？ (Select all that apply)

A. The EZONEXAM VLAN must be created.

B. The desired ports must be added to the new EZONEXAM VLAN.

C. The EZONEXAM VLAN must be added to all of the domains.

D. The EZONEXAM VLAN must be named.

E. An IP address must be configured for the EZONEXAM VLAN.

F. None of the above. VLAN creations are automatic.

Which Layer 4 protocol is used for a Telnet connection between two Ezonexam routers？

A. IP

B. ICMP

C. DNS

D. TCP

E. UDP

F. RTP

etwork administrator configure port security on this Ezonexam device？

A．To prevent unauthorized hosts from getting access to the LAN

B．To limit the number of Layer 2 broadcasts on a particular switch port

C．To prevent unauthorized Telnet or SSH access to a switch port

D．To prevent the IP and MAC address of the switch and associated ports

E．None of the above

u are instructed to enlarge the area covered by a single LAN segment on the Ezonexam network.

Which of the following are layer 1 devices that you can use？ (Choose all that apply.)

A．A switch

B．A router

C．A network adapter card

D．A hub

E．A repeater

VE1 is a switch in the Ezonexam network. Why will VE1 never learn the broadcast address？

A. Broadcast frames are never sent to switches

B. A broadcast frame. is never forwarded by a switch

C. Broadcasts only use network layer addressing

D. A broadcast address will never be the source address of a frame

E. Broadcast addresses use an incorrect format for the switching table

F. None of the above