Cisco certification 200-125 CCNA simulation questions | Passtcert

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Share some CCNA Routing and Switching 200-125 exam questions and answers below.
A network administrator needs to configure a serial link between the main office and a remote location. The router at the remote office is a non-cisco router. 
How should the network administrator configure the serial interface of the main office router to make the connection? 
A. Main(config)#interface serial 0/0 
Main(config-if)#ip address 172.16.1.1 255.255.255.252 
Main(config-if)#no shut 
B. Main(config)#interface serial 0/0 
Main(config-if)#ip address 172.16.1.1 255.255.255.252 
Main(config-if)#encapsulation ietf 
Main(config-if)#no shut 
C. Main(config)#interface serial 0/0 
Main(config-if)#ip address 172.16.1.1 255.255.255.252 
Main(config-if)#encapsulation frame-relay 
Main(config-if)#authenication chap 
Main(config-if)#no shut 
D. Main(config)#interface serial 0/0 
Main(config-if)#ip address 172.16.1.1 255.255.255.252 
Main(config-if)#encapsulation ppp 
Main(config-if)#no shut 
Answer: D

Which of the following describes the roles of devices in a WAN? (Choose three.) 
A. A CSU/DSU terminates a digital local loop 
B. A modem terminates a digital local loop 
C. A CSU/DSU terminates an analog local loop 
D. A modem terminates an analog local loop 
E. A router is commonly considered a DTE device 
F. A router is commonly considered a DCE device 
Answer: ADE

Which three circumstances can cause a GRE tunnel to be in an up/down state? (Choose three.) 
A. The tunnel interface IP address is misconfigured. 
B. The tunnel interface is down. 
C. A valid route to the destination address is missing from the routing table. 
D. The tunnel address is routed through the tunnel itself. 
E. The ISP is blocking the traffic. 
F. An ACL is blocking the outbound traffic. 
Answer: BCD

Which function does IP SLA ICMP ECHO operation perform to assist with troubleshooting 
A. packet-loss detection 
B. congestion detection 
C. hop-by-hop response time 
D. one way jitter measurement 
Answer: C 


For what two purposes does the Ethernet protocol use physical addresses? (Choose two.) 
A. to uniquely identify devices at Layer 2 
B. to allow communication with devices on a different network 
C. to differentiate a Layer 2 frame from a Layer 3 packet 
D. to establish a priority system to determine which device gets to transmit first 
E. to allow communication between different devices on the same network 
F. to allow detection of a remote device when its physical address is unknown 
Answer: A,E

What are three advantages of VLANs? (Choose three.) 
A. They establish broadcast domains in switched networks. 
B. They utilize packet filtering to enhance network security. 
C. They provide a method of conserving IP addresses in large networks. 
D. They provide a low-latency internetworking alternative to routed networks. 
E. They allow access to network services based on department, not physical location. 
F. They can simplify adding, moving, or changing hosts on the network. 
Answer: AEF

Which spanning-tree protocol rides on top of another spanning-tree protocol? 
A. MSTP 
B. RSTP 
C. PVST+ 
D. Mono Spanning Tree 
Answer: A

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