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2021 Nov 100-105 vce

Q81. - (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. 


Q82. - (Topic 1) 

Refer to the exhibit. 

Host A is sending a packet to Host B for the first time. What destination MAC address will Host A use in the ARP request? 

A. 192.168.0.1 

B. 172.16.0.50 

C. 00-17-94-61-18-b0 

D. 00-19-d3-2d-c3-b2 

E. ff-ff-ff-ff-ff-ff 

F. 255.255.255.255 

Answer: E Explanation: 

For the initial communication, Host A will send a broadcast ARP (all F's) to determine the correct address to use to reach the destination. ARP sends an Ethernet frame called an ARP request to every host on the shared link-layer legmen. The Ethernet header includes the source host MAC address and a destination address of all Fs representing a broadcast frame. The ARP request contains the sender's MAC and IP address and the target (destination) IP address. The target's MAC address is set to all 0s. ARP Request 

Reference: 

http://www.technicalhowto.com/protocols/arp/arp.html 


Q83. - (Topic 3) 

Which router command will configure an interface with the IP address 10.10.80.1/19? 

A. router(config-if)# ip address 10.10.80.1/19 

B. router(config-if)# ip address 10.10.80.1 255.255.0.0 

C. router(config-if)# ip address 10.10.80.1 255.255.255.0 

D. router(config-if)# ip address 10.10.80.1 255.255.224.0 

E. router(config-if)# ip address 10.10.80.1 255.255.240.0 

F. router(config-if)# ip address 10.10.80.1 255.255.255.240 

Answer:

Explanation: 

255.255.224 equal /19 in CIDR format hence the answer 


Q84. - (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:


Q85. - (Topic 3) 

Refer to the exhibit. 

The internetwork is using subnets of the address 192.168.1.0 with a subnet mask of 

255.255.255.224. The routing protocol in use is RIP version 1. Which address could be assigned to the FastEthernet interface on RouterA? 

A. 192.168.1.31 

B. 192.168.1.64 

C. 192.168.1.127 

D. 192.168.1.190 

E. 192.168.1.192 

Answer:

Explanation: 

Subnet mask 255.255.255.224 with CIDR of /27 which results in 32 hosts per. 

192.168.1.31 is the broadcast address for sunbet '0' 

192.168.1.64 is the network address for subnet '2' 

192.168.1.127 is the broadcast address for subnet '3' 

192.168.1.192 is the network address for subnet '6' 


Renewal 100-105 study guide:

Q86. - (Topic 4) 

How many addresses will be available for dynamic NAT translation when a router is configured with the following commands? 

Router(config)#ip nat pool TAME 209.165.201.23 209.165.201.30 netmask 

255.255.255.224 

Router(config)#ip nat inside source list 9 pool TAME 

A. 7 

B. 8 

C. 9 

D. 10 

E. 24 

F. 32 

Answer:

Explanation: 

209.165.201.23 to 209.165.201.30 provides for 8 addresses. 


Q87. - (Topic 1) 

How does a switch differ from a hub? 

A. A switch does not induce any latency into the frame transfer time. 

B. A switch tracks MAC addresses of directly-connected devices. 

C. A switch operates at a lower, more efficient layer of the OSI model. 

D. A switch decreases the number of broadcast domains. 

E. A switch decreases the number of collision domains. 

Answer:

Explanation: 

Some of the features and functions of a switch include: 

A switch is essentially a fast, multi-port bridge, which can contain dozens of ports. 

Rather than creating two collision domains, each port creates its own collision domain. 

In a network of twenty nodes, twenty collision domains exist if each node is plugged into its 

own switch port. 

If an uplink port is included, one switch creates twenty-one single-node collision domains. 

A switch dynamically builds and maintains a Content-Addressable Memory (CAM) table, 

holding all of the necessary MAC information for each port. 

For a detailed description of how switches operate, and their key differences to hubs, see 

the reference link below. 

Reference: http://www.cisco.com/warp/public/473/lan-switch-cisco.shtml 


Q88. - (Topic 3) 

What does administrative distance refer to? 

A. the cost of a link between two neighboring routers 

B. the advertised cost to reach a network 

C. the cost to reach a network that is administratively set 

D. a measure of the trustworthiness of a routing information source 

Answer:

Reference: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094195.shtml 

Administrative distance is the feature that routers use in order to select the best path when there are two or more different routes to the same destination from two different routing protocols. Administrative distance defines the reliability of a routing protocol. Each routing protocol is prioritized in order of most to least reliable (believable) with the help of an administrative distance value. 

Administrative distance is the first criterion that a router uses to determine which routing protocol to use if two protocols provide route information for the same destination. Administrative distance is a measure of the trustworthiness of the source of the routing information. The smaller the administrative distance value, the more reliable the protocol. 


Q89. - (Topic 5) 

Including the address on the Routed Ethernet interface, how many hosts can have IP addresses on the LAN to which Routed is connected? 

A. 6 

B. 30 

C. 62 

D. 126 

Answer:

Explanation: 

This is a /29 address, so there are 6 usable IP’s on this subnet. 


Q90. - (Topic 1) 

Refer to the exhibit. 

A network has been planned as shown. Which three statements accurately describe the areas and devices in the network plan? (Choose three.) 

A. Network Device A is a switch. 

B. Network Device B is a switch. 

C. Network Device A is a hub. 

D. Network Device B is a hub. 

E. Area 1 contains a Layer 2 device. 

F. Area 2 contains a Layer 2 device. 

Answer: A,D,E 

Explanation: 

Switches use a separate collision domain for each port, so device A must be a switch. Hubs, however, place all ports in the same collision domain so device B is a hub. Switches reside in layer 2 while hubs are layer 1 devices.