Download CCNA Cisco Certified Network Associate.testkings.200-125.2018-12-14.2e.605q.vcex

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Exam CCNA Cisco Certified Network Associate CCNA (v3.0)
Number 200-125
File Name CCNA Cisco Certified Network Associate.testkings.200-125.2018-12-14.2e.605q.vcex
Size 23.72 Mb
Posted December 14, 2018
Downloads 906

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Demo Questions

Question 1
Refer to the diagram. All hosts have connectivity with one another. Which statements describe the addressing scheme that is in use in the network? (Choose three.) 

  

  • A: The subnet mask in use is 255.255.255.192.
  • B: The subnet mask in use is 255.255.255.128.
  • C: The IP address 172.16.1.25 can be assigned to hosts in VLAN1
  • D: The IP address 172.16.1.205 can be assigned to hosts in VLAN1
  • E: The LAN interface of the router is configured with one IP address.
  • F: The LAN interface of the router is configured with multiple IP addresses.
Correct Answer: BCF
The subnet mask in use is 255.255.255.128: This is subnet mask will support up to 126 hosts, which is needed.
The IP address 172.16.1.25 can be assigned to hosts in VLAN1: The usable host range in this subnet is 172.16.1.1-172.16.1.126
The LAN interface of the router is configured with multiple IP addresses: The router will need 2 subinterfaces for the single physical interface, one with an IP address that belongs in each VLAN.



Question 2
The network administrator has been asked to give reasons for moving from IPv4 to IPv6. What are two valid reasons for adopting IPv6 over IPv4? (Choose two.)

  • A: no broadcast
  • B: change of source address in the IPv6 header
  • C: change of destination address in the IPv6 header
  • D: Telnet access does not require a password
  • E: autoconfiguration
  • F: NAT
Correct Answer: AE
IPv6 does not use broadcasts, and autoconfiguration is a feature of IPV6 that allows for hosts to automatically obtain an IPv6 address.



Question 3
An administrator must assign static IP addresses to the servers in a network. For network 192.168.20.24/29, the router is assigned the first usable host address while the sales server is given the last usable host address. Which of the following should be entered into the IP properties box for the sales server?

  • A:
      
  • B:
      
  • C:
      
  • D:
      
  • E:
      
Correct Answer: C
For the 192.168.20.24/29 network, the usable hosts are 192.168.24.25 (router) ?192.168.24.30 (used for the sales server).



Question 4
Which subnet mask would be appropriate for a network address range to be subnetted for up to eight LANs, with each LAN containing 5 to 26 hosts?

  • A: 0.0.0.240
  • B: 255.255.255.252
  • C: 255.255.255.0
  • D: 255.255.255.224
  • E: 255.255.255.240
Correct Answer: D
For a class C network, a mask of 255.255.255.224 will allow for up to 8 networks with 32 IP addresses each (30 usable).



Question 5
How many bits are contained in each field of an IPv6 address?

  • A: 24
  • B: 4
  • C: 8
  • D: 16
Correct Answer: D
An IPv6 address is represented as eight groups of four hexadecimal digits, each group representing 16 bits (two octets). The groups are separated by colons (:). An example of an IPv6 address is 2001:0db8:85a3:0000:0000:8a2e:0370:7334.



Question 6
What are three approaches that are used when migrating from an IPv4 addressing scheme to an IPv6 scheme. (Choose three.)

  • A: enable dual-stack routing
  • B: configure IPv6 directly
  • C: configure IPv4 tunnels between IPv6 islands
  • D: use proxying and translation to translate IPv6 packets into IPv4 packets
  • E: statically map IPv4 addresses to IPv6 addresses
  • F: use DHCPv6 to map IPv4 addresses to IPv6 addresses
Correct Answer: ACD
Several methods are used terms of migration including tunneling, translators, and dual stack. Tunnels are used to carry one protocol inside another, while translators simply translate IPv6 packets into IPv4 packets. Dual stack uses a combination of both native IPv4 and IPv6. With dual stack, devices are able to run IPv4 and IPv6 together and if IPv6 communication is possible that is the preferred protocol. Hosts can simultaneously reach IPv4 and IPv6 content.



Question 7
Refer to the exhibit. In this VLSM addressing scheme, what summary address would be sent from router A? 

  

  • A: 172.16.0.0 /16
  • B: 172.16.0.0 /20
  • C: 172.16.0.0 /24
  • D: 172.32.0.0 /16
  • E: 172.32.0.0 /17
  • F: 172.64.0.0 /16
Correct Answer: A
Router A receives 3 subnets: 172.16.64.0/18, 172.16.32.0/24 and 172.16.128.0/18. All these 3 subnets have the same form of 172.16.x.x so our summarized subnet must be also in that form -> Only A, B or.
The smallest subnet mask of these 3 subnets is /18 so our summarized subnet must also have its subnet mask equal or smaller than /18. 
-> Only answer A has these 2 conditions ->



Question 8
How is an EUI-64 format interface ID created from a 48-bit MAC address?

  • A: by appending 0xFF to the MAC address
  • B: by prefixing the MAC address with 0xFFEE
  • C: by prefixing the MAC address with 0xFF and appending 0xFF to it
  • D: by inserting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
  • E: by prefixing the MAC address with 0xF and inserting 0xF after each of its first three bytes
Correct Answer: D
The modified EUI-64 format interface identifier is derived from the 48-bit link-layer (MAC) address by inserting the hexadecimal number FFFE between the upper three bytes (OUI field) and the lower three bytes (serial number) of the link layer address.



Question 9
Refer to the exhibit. What is the most efficient summarization that R1 can use to advertise its networks to R2? 

  

  • A: 172.1.0.0/24
  • B: 172.1.2.0/21
  • C: 172.1.4.0/22
  • D:
      
  • E:
      
Correct Answer: C
The 172.1.4.0/22 subnet encompasses all routes from the IP range 172.1.4.0 ?172.1.7.255.



Question 10
Which three are characteristics of an IPv6 anycast address? (Choose three.)

  • A: one-to-many communication model
  • B: one-to-nearest communication model
  • C: any-to-many communication model
  • D: a unique IPv6 address for each device in the group
  • E: the same address for multiple devices in the group
  • F: delivery of packets to the group interface that is closest to the sending device
Correct Answer: EF
A new address type made specifically for IPv6 is called the Anycast Address. These IPv6 addresses are global addresses, these addresses can be assigned to more than one interface unlike an IPv6 unicast address. Anycast is designed to send a packet to the nearest interface that is a part of that anycast group. 
The sender creates a packet and forwards the packet to the anycast address as the destination address which goes to the nearest router. The nearest router or interface is found by using the metric of a routing protocol currently running on the network. However, in a LAN setting the nearest interface is found depending on the order the neighbors were learned. The anycast packet in a LAN setting forwards the packet to the neighbor it learned about first.






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