Cisco certification 200-125 CCNA exam answers | Passtcert

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Share some CCNA Routing and Switching 200-125 exam questions and answers below.
What are three characteristics of the TCP protocol? (Choose three.) 
A. It uses a single SYN-ACK message to establish a connection. 
B. The connection is established before data is transmitted. 
C. It ensures that all data is transmitted and received by the remote device. 
D. It supports significantly higher transmission speeds than UDP. 
E. It requires applications to determine when data packets must be retransmitted. 
F. It uses separate SYN and ACK messages to establish a connection. 
Answer: BCF

Which three statements accurately describe Layer 2 Ethernet switches? (Choose three.) 
A. Spanning Tree Protocol allows switches to automatically share VLAN information. 
B. Establishing VLANs increases the number of broadcast domains. 
C. Switches that are configured with VLANs make forwarding decisions based on both Layer 2 and Layer 3 address information. 
D. Microsegmentation decreases the number of collisions on the network. 
E. In a properly functioning network with redundant switched paths, each switched segment 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. 
F. If a switch receives a frame for an unknown destination, it uses ARP to resolve the address. 
Answer: B,D,E

What 8-bit field exists in IP packet for QoS? 
A. Tos Field 
B. DSCP 
C. IP Precedence 
D. Cos 
Answer: A

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 two statements about using leased lines for your WAN infrastructure are true? (Choose two.) 
A. Leased lines provide inexpensive WAN access. 
B. Leased lines with sufficient bandwidth can avoid latency between endpoints. 
C. Leased lines require little installation and maintenance expertise. 
D. Leased lines provide highly flexible bandwidth scaling. 
E. Multiple leased lines can share a router interface. 
F. Leased lines support up to T1 link speeds. 
Answer: CD

Which two statements about northbound and southbound APIs are true? (Choose two.) 
A. Only southbound APIs allow program control of the network. 
B. Only northbound APIs allow program control of the network. 
C. Only southbound API interfaces use a Service Abstraction Layer. 
D. Only northbound API interfaces use a Service Abstraction Layer. 
E. Both northbound and southbound API interfaces use a Service Abstraction Layer. 
F. Both northbound and southbound APIs allow program control of the network. 
Answer: BC

What is true about Ethernet? (Choose Two.) 
A. 802.2 Protocol 
B. 802.3 Protocol 
C. 10BaseThalf duplex 
D. CSMA/CD Stops transmitting when congestion occurs 
E. CSMA/CA Stops transmitting when congestion occurs 
Answer: BD 

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