多項選擇題Which two protocols are used by bridges and/or switches to prevent loops in a layer 2 network? （）

A.802.1d
B.VTP
C.802.1q
D.STP
E.SAP


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1.單項選擇題A router receives information about network 192.168.10.0/24 from multiple sources.What will the routerconsider the most reliable information about the path to that network？（）

A.an OSPF update for network 192.168.0.0/16
B.a static router to network 192.168.10.0/24
C.a static router to network 192.168.10.0/24 with a local serial interface configured as the next hop
D.a RIP update for network 192.168.10.0/24
E.a directly connected interface with an address of 192.168.10.254/24
F.a default route with a next hop address of 192.168.10.1

3.多項選擇題The network administrator of the Oregon router adds the following command to the router configuration: ip route 192.168.12.0 255.255.255.0 172.16.12.1. What are the results of adding this command (Choose two.)（）。

A.The command establishes a static route.
B.The command invokes a dynamic routing protocol for 192.168.12.0.
C.Traffic for network 192.168.12.0 is forwarded to 172.16.12.1.
D.Traffic for all networks is forwarded to 172.16.12.1.
E.This route is automatically propagated throughout the entire network.
F.Trafficfor network 172.16.12.0 is forwarded to the 192.168.12.0 network.

5.多項選擇題Which two benefits are provided by creating VLANs? （）

A.added security
B.dedicated bandwidth
C.provides segmentation
D.allows switches to route traffic between subinterfaces
E.contains collisions

6.多項選擇題Which of the following are key characteristics of PPP (Choose three.)（）。

A.can be used over analog circuits
B.maps Layer 2 to Layer 3 address
C.encapsulates several routed protocols
D.supports IP only
E.provides error correction

7.多項選擇題Which three elements must be used when you configure a router interface for vlan trunking？（）

A.one IP network or subnetwork for each subinterface
B.subinterface numbering that matches vlan tages
C.subinterface encapsulation identifiers that match vlan tags
D.a management domain for each subinterface
E.one physical interface for each subinterface
F.one subinterface per vlan

8.多項選擇題Which two benefits are provided by using a hierarchical addressing network addressing scheme? （）

A.reduces routing table entries
B.auto-negotiation of media rates
C.efficient utilization of MAC addresses
D.dedicated communications between devices
E.ease of management and troubleshooting

9.單項選擇題Which dose the frame-relay interface-dlinterface-dlcci command configure?（）

A.remote DLCI on the main interface
B.local DLCI on the main interface
C.local DLCI on the subinterface
D.remote DLCI on the subinterface

10.多項選擇題Which two tasks does the Dynamic Host Configuration Protocol perform?（）

A.Set the IP gateway to be used by the network.
B.Perform host discovery used DHCPDISCOVER message.
C.Configure IP address parameters from DHCP server to a host.
D.Provide an easy management of layer 3 devices.
E.Monitor IP performance using the DHCP server.
F.Assign and renew IP address from the default pool.