Update 200-125 CCNA Cisco Certified Network Associate CCNA (v3.0)

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Share some CCNA Routing and Switching 200-125 exam questions and answers below.
Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two.) 
A. The transport layer divides a data stream into segments and may add reliability and flow control information. 
B. The data link layer adds physical source and destination addresses and an FCS to the segment. 
C. Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information. 
D. Packets are created when the network layer adds Layer 3 addresses and control information to a segment. 
E. The presentation layer translates bits into voltages for transmission across the physical link. 
Answer: A,D

What is true about DTP? (Choose Three.) 
A. Layer 2 protocol 
B. Layer 3 protocol 
C. Proprietary protocol 
D. enabled by default 
E. disabled by default 
Answer: ACD

Which three statements accurately describe layer 2 Ethernet switches?(choose three) 
A. Micro segmentation decreases the number of collisions on the network. 
B. if a switch receives a frame for an unkown destination, it uses ARP to resolve the address. 
C. Spanning Tree Protocol allows switches to automatically share vlan information. 
D. In a properly functioning network with redundant switched paths, each switched aegment will contain one root bridge with all its ports in the forwarding state. All other switches in that broadcast domain will have only one root port. 
E. Establishing vlans increases the number of broadcast domains. 
F. Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3 address information. 
Answer: ADE

Which command can you enter to determine whether serial interface 0/2/0 has been configured using HDLC encapsulation? 
A. router#show platform 
B. router#show interfaces Serial 0/2/0 
C. router#show ip interface s0/2/0 
D. router#show ip interface brief 
Answer: B

Which interface counter can you use to diagnose a duplex mismatch problem? 
A. no earner B. late collisions 
C. giants 
D. CRC errors 
E. deferred 
F. runts 
Answer: B

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 

A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port? 
A. This is a 10 Mb/s switch port. 
B. This is a 100 Mb/s switch port. 
C. This is an Ethernet port operating at half duplex. 
D. This is an Ethernet port operating at full duplex. 
E. This is a port on a network interface card in a PC. 
Answer: C

Which command can you enter to verify that a BGP connection to a remote device is established? 
A. show ip bgp summary 
B. show ip community-list 
C. show ip bgp paths 
D. show ip route 
Answer: A

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