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Q71. - (Topic 2) 

Which two options will help to solve the problem of a network that is suffering a broadcast storm? (Choose two.) 

A. a bridge 

B. a router 

C. a hub 

D. a Layer 3 switch 

E. an access point 

Answer: B,D 

Explanation: 

Routers and layer 3 switches will not propagate broadcast traffic beyond the local segment, so the use of these devices is the best method for eliminating broadcast storms. 


Q72. - (Topic 3) 

Which one of the following IP addresses is the last valid host in the subnet using mask 255.255.255.224? 

A. 192.168.2.63 

B. 192.168.2.62 

C. 192.168.2.61 

D. 192.168.2.60 

E. 192.168.2.32 

Answer:

Explanation: 

With the 224 there are 8 networks with increments of 32 One of these is 32 33 62 63 where 63 is broadcast so 62 is last valid host out of given choices. 


Q73. - (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: 


Q74. - (Topic 1) 

Refer to the exhibit. 

If the hubs in the graphic were replaced by switches, what would be virtually eliminated? 

A. broadcast domains 

B. repeater domains 

C. Ethernet collisions 

D. signal amplification 

E. Ethernet broadcasts 

Answer:

Explanation: 

Modern wired networks use a network switch to eliminate collisions. By connecting each device directly to a port on the switch, either each port on a switch becomes its own collision domain (in the case of half duplex links) or the possibility of collisions is eliminated entirely in the case of full duplex links. 


Q75. - (Topic 5) 

Refer to the exhibit. 

A network administrator has configured a Catalyst 2950 switch for remote management by pasting into the console the configuration commands that are shown in the exhibit. However, a Telnet session cannot be successfully established from a remote host. What should be done to fix this problem? 

A. Change the first line to interface fastethernet 0/1. 

B. Change the first line to interface vlan 0/1. 

C. Change the fifth line to ip default-gateway 192.168.17.241. 

D. Change the fifth line to ip route 0.0.0.0 0.0.0.0 192.168.17.1. 

E. Change the sixth line to line con 0. 

Answer:

Explanation: 

The default gateway must reside on the same IP subnet as the device. Here, the subnet mask for the VLAN interface is /228. Only choice C will fix this issue, as then the default gateway is on the same subnet as the 2950. 


Q76. - (Topic 1) 

Refer to the topology and switching table shown in the graphic. 

Host B sends a frame to Host C. What will the switch do with the frame? 

A. Drop the frame 

B. Send the frame out all ports except port 0/2 

C. Return the frame to Host B 

D. Send an ARP request for Host C 

E. Send an ICMP Host Unreachable message to Host B 

F. Record the destination MAC address in the switching table and send the frame directly to Host C 

Answer:


Q77. - (Topic 7) 

Which value is indicated by the next hop in a routing table? 

A. preference of the route source 

B. IP address of the remote router for forwarding the packets 

C. how the route was learned 

D. exit interface IP address for forwarding the packets 

Answer:

Explanation: 

The routing table contains network/next hop associations. These associations tell a router that a particular destination can be optimally reached by sending the packet to a specific router that represents the "next hop" on the way to the final destination. The next hop association can also be the outgoing or exit interface to the final destination. 


Q78. - (Topic 7) 

What is one requirement for interfaces to run IPv6? 

A. An IPv6 address must be configured on the interface. 

B. An IPv4 address must be configured. 

C. Stateless autoconfiguration must be enabled after enabling IPv6 on the interface. 

D. IPv6 must be enabled with the ipv6 enable command in global configuration mode. 

Answer:

Explanation: To use IPv6 on your router, you must, at a minimum, enable the protocol and assign IPv6 addresses to your interfaces. 


Q79. - (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 


Q80. - (Topic 3) 

The internetwork infrastructure of company XYZ consists of a single OSPF area as shown in the graphic. There is concern that a lack of router resources is impeding internetwork performance. As part of examining the router resources, the OSPF DRs need to be known. All the router OSPF priorities are at the default and the router IDs are shown with each router. 

Which routers are likely to have been elected as DR? (Choose two.) 

A. Corp-1 

B. Corp-2 

C. Corp-3 

D. Corp-4 

E. Branch-1 

F. Branch-2 

Answer: D,F 

Explanation: 

There are 2 segments on the topology above which are separated by Corp-3 router. Each 

segment will have a DR so we have 2 DRs. 

To select which router will become DR they will compare their router-IDs. The router with 

highest (best) router-ID will become DR. The router-ID is chosen in the order below: 

+

 The highest IP address assigned to a loopback (logical) interface. 

+

 If a loopback interface is not defined, the highest IP address of all active router’s physical interfaces will be chosen. 

In this question, the IP addresses of loopback interfaces are not mentioned so we will consider IP addresses of all active router’s physical interfaces. Router Corp-4 (10.1.40.40) 

& Branch-2 (10.2.20.20) have highest “active” IP addresses so they will become DRs.