多項選擇題A network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?（）

A. ARP
B. CDP
C. DHCP
D. DNS
E. ICMP


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1.單項選擇題What is the purpose of Spanning Tree Protocol?（）

A. to prevent routing loops
B. to create a default route
C. to provide multiple gateways for hosts
D. to maintain a loop-free Layer 2 network topology
E. to enhance the functions of SNMP

2.單項選擇題What is the function of the CSMA/CD algorithm in Ethernet technologies?（）

A. defines how the media is accessed
B. supplies a token to determine which host has access to the media
C. defines the encoding of electrical signals on the wire
D. determines the preamble bits

3.單項選擇題What value is primarily used to determine which port becomes the root port on each non root switch in a spanning-tree topology?（）

A. path cost
B. lowest port MAC address
C. VTP revision number
D. highest port priority number
E. port priority number and MAC address

4.單項選擇題What is the purpose of the OSPF router ID in a OR/BOR election?（）

A. It is used with the OSPF priority values to determine which OSPF router will become the DR or BOR in a point-to-point network
B. It is used with the OSPF priority values to determine which interface will be used to form a neighbor relationship with another OSPF router
C. It is used with the OSPF priority values to determine which router will become the DR or BOR in a multi access network
D. It is used to determine which interfaces will send Hello packets to neighboring OSPF routers

5.單項選擇題A network administrator needs to verify that switch interface 0/5 has been assigned to the Sales VLA.N. Which command will accomplish this task?（）

A. Show vlan
B. Show mac-address-table
C. Show vtp status
D. show spanning-tree root
E. show ip interface brief