CertTree CCNA certification 200-125 study guide

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Share some CCNA Routing and Switching 200-125 exam questions and answers below.
A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the network administrator is using for this operation?
A. application
B. presentation
C. session
D. transport
E. internet
F. data link
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

A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4.
Which route or routes will the router install in the routing table?
A. the OSPF route
B. the EIGRP route
C. the RIPv2 route
D. all three routes
E. the OSPF and RIPv2 routes
Answer: B

Which two spanning-tree port states does RSTP combine to allow faster convergence? (Choose two.)
A. blocking
B. listening
C. learning
D. forwarding
E. discarding
Answer: AB

Which command would you configure globally on a Cisco router that would allow you to view directly connected Cisco devices?
A. R(config-if)#cdp run
B. R(config-if)#cdp enable
C. R(config)#cdp run
D. R(config)#cdp enable
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

Which statement about RADIUS security is true?
A. It supports EAP authentication for connecting to wireless networks.
B. It provides encrypted multiprotocol support.
C. Device-administration packets are encrypted in their entirety.
D. It ensures that user activity is fully anonymous.
Answer: A

Two hosts are attached to a switch with the default configuration.
Which statement about the configuration is true?
A. IP routing must be enabled to allow the two hosts to communicate.
B. The two hosts are in the same broadcast domain.
C. The switch must be configured with a VLAN to allow the two hosts to communicate.
D. Port security prevents the hosts from connecting to the switch.
Answer: B

Which two statements about wireless LAN controllers are true? (Choose two.)
A. They can simplify the management and deployment of wireless LANs.
B. They rely on external firewalls for WLAN security.
C. They are best suited to smaller wireless networks.
D. They must be configured through a GUI over HTTP or HTTPS.
E. They can manage mobility policies at a systemwide level.
Answer: AE

What will be the result if the following configuration commands are implemented on a Cisco switch?
Switch(config-if)# switchport port-security
Switch(config-if)# switchport port-security mac-address sticky
A. A dynamically learned MAC address is saved in the startup-configuration file.
B. A dynamically learned MAC address is saved in the running-configuration file.
C. A dynamically learned MAC address is saved in the VLAN database.
D. Statically configured MAC addresses are saved in the startup-configuration file if frames from that address are received.
E. Statically configured MAC addresses are saved in the running-configuration file if frames from that address are received.
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

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 feature can you implement to reserve bandwidth for VoIP calls across the call path?
A. PQ
B. CBWFQ
C. round robin
D. RSVP
Answer: D


Which two statements about IPv6 and routing protocols are true? (Choose two.)
A. EIGRPv3 was developed to support IPv6 routing.
B. OSPFv3 was developed to support IPv6 routing.
C. Loopback addresses are used to form routing adjacencies.
D. EIGRP, OSPF, and BGP are the only routing protocols that support IPv6.
E. Link-local addresses are used to form routing adjacencies.
Answer: BE

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

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