Valid CCNA Routing and Switching 200-125 dumps questions

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Share some CCNA Routing and Switching 200-125 exam questions and answers below.
Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms? 
A. Frame Relay 
B. HDLC 
C. x.25 
D. PPP 
Answer: D

A receiving host computes the checksum on a frame and determines that the frame is damaged. The frame is then discarded. At which OSI layer did this happen? 
A. session 
B. transport 
C. network 
D. data link 
E. physical 
Answer: D

What is the authoritative source for an address lookup? 
A. a recursive DNS search 
B. the operating system cache 
C. the ISP local cache 
D. the browser cache 
Answer: A

Which two statements about IPv4 multicast traffic are true? (Choose two.) 
A. It burdens the source host without affecting remote hosts. 
B. It uses a minimum amount of network bandwidth. 
C. It is bandwidth-intensive. 
D. It simultaneously delivers multiple streams of data. 
E. It is the most efficient way to deliver data to multiple receivers. 
Answer: BE

What feature uses a random time to re-sent a frame? 
A. CSMA/CA 
B. CSMA/CD 
Answer: B

How to create a trunk port and allow VLAN 20? (Choose Three.) 
A. switchport trunk encapsulation dot1q 
B. switchport mode trunk 
C. switchport trunk allowed vlan 20 
D. switchport trunk native vlan 20 
Answer: ABC

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

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

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