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2021 Jan ccnax 200-120 study guide:

Q181. - (Topic 3) 

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 

Answer: A,C,D 


Q182. - (Topic 4) 

Which two statements about the OSPF Router ID are true? (Choose two.) 

A. It identifies the source of a Type 1 LSA. 

B. It should be the same on all routers in an OSPF routing instance. 

C. By default, the lowest IP address on the router becomes the OSPF Router ID. 

D. The router automatically chooses the IP address of a loopback as the OSPF Router ID. 

E. It is created using the MAC Address of the loopback interface. 

Answer: A,D 


Q183. - (Topic 1) 

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 


Q184. - (Topic 2) 

Refer to the exhibit. 

Which statement is true? 

A. The Fa0/11 role confirms that SwitchA is the root bridge for VLAN 20. 

B. VLAN 20 is running the Per VLAN Spanning Tree Protocol. 

C. The MAC address of the root bridge is 0017.596d.1580. 

D. SwitchA is not the root bridge, because not all of the interface roles are designated. 

Answer: D 


Q185. - (Topic 4) 

Users on the 172.17.22.0 network cannot reach the server located on the 172.31.5.0 network. The network administrator connected to router Coffee via the console port, issued the show ip route command, and was able to ping the server. 

Based on the output of the show ip route command and the topology shown in the graphic, what is the cause of the failure? 

A. The network has not fully converged. 

B. IP routing is not enabled. 

C. A static route is configured incorrectly. 

D. The FastEthernet interface on Coffee is disabled. 

E. The neighbor relationship table is not correctly updated. 

F. The routing table on Coffee has not updated . 

Answer: C 


Leading ccna test 200-120:

Q186. - (Topic 2) 

At which layer of the OSI model is RSTP used to prevent loops? 

A. physical 

B. data link 

C. network 

D. transport 

Answer: B 


Q187. - (Topic 2) 

Which are valid modes for a switch port used as a VLAN trunk? (Choose three.) 

A. transparent 

B. auto 

C. on 

D. desirable 

E. blocking 

F. forwarding 

Answer: B,C,D 


Q188. - (Topic 3) 

Which option is a valid IPv6 address? 

A. 2001:0000:130F::099a::12a 

B. 2002:7654:A1AD:61:81AF:CCC1 

C. FEC0:ABCD:WXYZ:0067::2A4 

D. 2004:1:25A4:886F::1 

Answer: D 


Q189. - (Topic 5) 

Which three statements about HSRP operation are true? (Choose three.) 

A. The virtual IP address and virtual MA+K44C address are active on the HSRP Master router. 

B. The HSRP default timers are a 3 second hello interval and a 10 second dead interval. 

C. HSRP supports only clear-text authentication. 

D. The HSRP virtual IP address must be on a different subnet than the routers' interfaces on the same LAN. 

E. The HSRP virtual IP address must be the same as one of the router's interface addresses on the LAN. 

F. HSRP supports up to 255 groups per interface, enabling an administrative form of load balancing. 

Answer: A,B,F 


Q190. CORRECT TEXT - (Topic 7) 

A network associate is configuring a router for the weaver company to provide internet access. The ISP has provided the company six public IP addresses of 198.18.184.105 

198.18.184.110. The company has 14 hosts that need to access the internet simultaneously. The hosts in the company LAN have been assigned private space addresses in the range of 192.168.100.17 – 192.168.100.30. 

Answer: The company has 14 hosts that need to access the internet simultaneously but 

we just have 6 public IP addresses from 198.18.184.105 to 198.18.184.110/29. 

Therefore we have to use NAT overload (or PAT) 

Double click on the Weaver router to open it 

Router>enable Router#configure terminal 

First you should change the router's name to Weaver 

Router(config)#hostname Weaver 

Create a NAT pool of global addresses to be allocated with their netmask. 

Weaver(config)#ip nat pool mypool 198.18.184.105 198.18.184.110 netmask 255.255.255.248 

Create a standard access control list that permits the addresses that are to be translated 

Weaver(config)#access-list 1 permit 192.168.100.16 0.0.0.15 

Establish dynamic source translation, specifying the access list that was defined in the prior step 

Weaver(config)#ip nat inside source list 1 pool mypool overload 

This command translates all source addresses that pass access list 1, which means a source address from 192.168.100.17 to 192.168.100.30, into an address from the pool named mypool (the pool contains addresses from 

198.18.184.105 to 198.18.184.110) Overload keyword allows to map multiple IP addresses to a single registered IP address (many-to-one) by using different ports The question said that appropriate interfaces have been configured for NAT inside and NAT outside statements. This is how to configure the NAT inside and NAT outside, just for your understanding: 

Weaver(config)#interface fa0/0 Weaver(config-if)#ip nat inside Weaver(config-if)#exit Weaver(config)#interface s0/0 Weaver(config-if)#ip nat outside Weaver(config-if)#end 

Finally, we should save all your work with the following command: 

Weaver#copy running-config startup-config 

Check your configuration by going to "Host for testing" and type: 

C :>ping 192.0.2.114 

The ping should work well and you will be replied from 192.0.2.114