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2016 Dec 100-105 dumps

Q11. - (Topic 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. IP address: 192.168.20.14 Subnet Mask: 255.255.255.248 Default Gateway: 192.168.20.9 

B. IP address: 192.168.20.254 Subnet Mask: 255.255.255.0 Default Gateway: 192.168.20.1 

C. IP address: 192.168.20.30 Subnet Mask: 255.255.255.248 Default Gateway: 192.168.20.25 

D. IP address: 192.168.20.30 Subnet Mask: 255.255.255.240 Default Gateway: 192.168.20.17 

E. IP address: 192.168.20.30 Subnet Mask: 255.255.255.240 Default Gateway: 192.168.20.25 

Answer:

Explanation: 

With network 192.168.20.24/29 we have: 

Increment: 8 (/29 = 255.255.255.248 = 11111000 for the last octet) 

Network address: 192.168.20.24 (because 24 = 8 * 3) 

Broadcast address: 192.168.20.31 (because 31 = 24 + 8 – 1) 

Therefore the first usable IP address is 192.168.20.25 (assigned to the router) and the last usable IP address is 192.168.20.30 (assigned to the sales server). The IP address of the router is also the default gateway of the sales server. 


Q12. - (Topic 7) 

Which statement about native VLAN traffic is true? 

A. Cisco Discovery Protocol traffic travels on the native VLAN by default 

B. Traffic on the native VLAN is tagged with 1 by default 

C. Control plane traffic is blocked on the native VLAN. 

D. The native VLAN is typically disabled for security reasons 

Answer:


Q13. - (Topic 7) 

Which component of the routing table ranks routing protocols according to their preferences? 

A. administrative distance 

B. next hop 

C. metric 

D. routing protocol code 

Answer:

Explanation: 

Administrative distance - This is the measure of trustworthiness of the source of the 

route. If a router learns about a destination from more than one routing protocol, 

administrative distance is compared and the preference is given to the routes with lower 

administrative distance. In other words, it is the believability of the source of the route. 


Q14. - (Topic 3) 

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:

Explanation: 

When one route is advertised by more than one routing protocol, the router will choose to use the routing protocol which has lowest Administrative Distance. The Administrative Distances of popular routing protocols are listed below: 


Q15. - (Topic 3) 

Refer to the output of the corporate router routing table shown in the graphic. 

The corporate router receives an IP packet with a source IP address of 192.168.214.20 and a destination address of 192.168.22.3. 

What will the router do with this packet? 

A. It will encapsulate the packet as Frame Relay and forward it out interface Serial 0/0.117. 

B. It will discard the packet and send an ICMP Destination Unreachable message out interface FastEthernet 0/0. 

C. It will forward the packet out interface Serial 0/1 and send an ICMP Echo Reply message out interface serial 0/0.102. 

D. It will change the IP packet to an ARP frame and forward it out FastEthernet 0/0. 

Answer:

Explanation: 

Since the destination network is not in the routing table, and no default gateway has been configured, the router will discard the packet and send an ICMP Destination Unreachable message out interface FastEthernet 0/0. It knows to send it out Fa 0/0 because the routing table for the source IP address of 192.168.214.20 shows it was learned from the Fa 0/0 interface. 


Up to the immediate present 100-105 test question:

Q16. - (Topic 3) 

Refer to the exhibit. 

Why are two OSPF designated routers identified on Core-Router? 

A. Core-Router is connected to more than one multi-access network. 

B. The router at 208.149.23.130 is a secondary DR in case the primary fails. 

C. Two router IDs have the same OSPF priority and are therefore tied for DR election 

D. The DR election is still underway and there are two contenders for the role. 

Answer:

Explanation: 

OSPF elects one DR per multi-access network. In the exhibit there are two DR so there must have more than one multi-access network. 


Q17. - (Topic 3) 

Which IP addresses are valid for hosts belonging to the 10.1.160.0/20 subnet? (Choose three.) 

A. 10.1.168.0 

B. 10.1.176.1 

C. 10.1.174.255 

D. 10.1.160.255 

E. 10.1.160.0 

F. 10.1.175.255 

Answer: A,C,D 

Explanation: 

All IP address in IP ranges between: 10.1.160.1 and 10.1.175.254 are valid as shown below Address: 10.1.160.0 00001010.00000001.1010 0000.00000000 Netmask: 255.255.240.0 = 20 11111111.11111111.1111 0000.00000000 Wildcard: 0.0.15.255 00000000.00000000.0000 1111.11111111 

Which implies that: Network: 10.1.160.0/20 00001010.00000001.1010 0000.00000000 HostMin: 10.1.160.1 00001010.00000001.1010 0000.00000001 HostMax: 10.1.175.254 00001010.00000001.1010 1111.11111110 Broadcast: 10.1.175.255 00001010.00000001.1010 1111.11111111 


Q18. - (Topic 3) 

Which IP address is a private address? 

A. 12.0.0.1 

B. 168.172.19.39 

C. 172.20.14.36 

D. 172.33.194.30 

E. 192.169.42.34 

Answer:


Q19. - (Topic 5) 

Refer to the exhibit. 

A user cannot reach any web sites on the Internet, but others in the department are not 

having a problem. 

What is the most likely cause of the problem? 

A. IP routing is not enabled. 

B. The default gateway is not in the same subnet. 

C. A DNS server address is not reachable by the PC. 

D. A DHCP server address is not reachable by the PC. 

E. NAT has not been configured on the router that connects to the Internet. 

Answer:

Explanation: 

Answer C is only answer that makes sense. IP routing does not need to be enabled on PC’s, this is a router function. We can see from the output that the PC and default gateway are on the same subnet. DHCP has not been enabled on this PC so it has been configured with a static address so reaching the DHCP server is not the issue. Finally, NAT must be configured correctly or the other users in the department would also be having issues. 


Q20. - (Topic 5) 

Refer to the exhibit. 

Why did the device return this message? 

A. The command requires additional options or parameters 

B. There is no show command that starts with ru. 

C. The command is being executed from the wrong router mode. 

D. There is more than one show command that starts with the letters ru. 

Answer: D Explanation: 

Answer D is correct because when you type the incomplete command it will not autocomplete if there is more than one option for completing the command. In this case, there is another command that also starts with “show ru”