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2017 Mar 100-105 practice test

Q91. - (Topic 5) 

What is the bandwidth on the WAN interface of Router 1? 

A. 16 Kbit/sec 

B. 32 Kbit/sec 

C. 64 Kbit/sec 

D. 128 Kbit/sec 

E. 512 Kbit/sec 

F. 1544 Kbit/sec 

Answer:

Explanation: 

Use the “show interface s0/0” to see the bandwidth set at 16 Kbit/sec. The show interface s0/0 command results will look something like this and the bandwidth will be represented by the "BW" on the fourth line as seen below where BW equals 1544 Kbits/sec. R2#show interface serial 0/0 Serial0/0 is up, line protocol is down Hardware is GT96K Serial Internet address is 10.1.1.5/30 MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 uses. 


Q92. - (Topic 7) 

Which component of a routing table entry represents the subnet mask? 

A. routing protocol code 

B. prefix 

C. metric 

D. network mask 

Answer:

Explanation: 

IP Routing Table Entry TypesAn entry in the IP routing table contains the following information in the order presented: Network ID. The network ID or destination corresponding to the route. The network ID can be class-based, subnet, or supernet network ID, or an IP address for a host route. Network Mask. The mask that is used to match a destination IP address to the network ID. Next Hop. The IP address of the next hop. Interface. An indication of which network interface is used to forward the IP packet. Metric. A number used to indicate the cost of the route so the best route among possible multiple routes to the same destination can be selected. A common use of the metric is to indicate the number of hops (routers crossed) to the network ID. Routing table entries can be used to store the following types of routes: Directly Attached Network IDs. Routes for network IDs that are directly attached. For directly attached networks, the Next Hop field can be blank or contain the IP address of the interface on that network. Remote Network IDs. Routes for network IDs that are not directly attached but are available across other routers. For remote networks, the Next Hop field is the IP address of a local router in between the forwarding node and the remote network. Host Routes. A route to a specific IP address. Host routes allow routing to occur on a per-IP address basis. For host routes, the network ID is the IP address of the specified host and the network mask is 255.255.255.255. Default Route. The default route is designed to be used when a more specific network ID or host route is not found. The default route network ID is 0.0.0.0 with the network mask of 

0.0.0.0. 


Q93. - (Topic 1) 

Which transport layer protocol provides best-effort delivery service with no acknowledgment receipt required? 

A. HTTP 

B. IP 

C. TCP 

D. Telnet 

E. UDP 

Answer:

Explanation: 

UDP provides a connectionless datagram service that offers best-effort delivery, which means that UDP does not guarantee delivery or verify sequencing for any datagrams. A source host that needs reliable communication must use either TCP or a program that provides its own sequencing and acknowledgment services. 


Q94. - (Topic 5) 

Two routers named Atlanta and Brevard are connected by their serial interfaces as shown in the exhibit, but there is no data connectivity between them. The Atlanta router is known to have a correct configuration. 

Given the partial configurations shown in the exhibit, what is the problem on the Brevard router that is causing the lack of connectivity? 

A. A loopback is not set. 

B. The IP address is incorrect. 

C. The subnet mask is incorrect. 

D. The serial line encapsulations are incompatible. 

E. The maximum transmission unit (MTU) size is too large. 

F. The bandwidth setting is incompatible with the connected interface. 

Answer:

Explanation: 

The connection between two routers must have IP addresses that belong to the same subnet, but in this case Atlanta is using 192.168.10.1/24 and the other is in 192.168.11.1/24. 


Q95. - (Topic 5) 

What is the purpose of the switchport command? 

Switch(config-if)# switchport port-security maximum 1 

Switch(config-if)# switchport port-security mac-address 0018.DE8B.4BF8 

A. It ensures that only the device with the MAC address 0018.DE8B.4BF8 will be able to connect to the port that is being configured. 

B. It informs the switch that traffic destined for MAC address 0018.DE8B.4BF8 should only be sent to the port that is being configured. 

C. It will act like an access list and the port will filter packets that have a source or destination MAC of 0018.DE8B.4BF8. 

D. The switch will shut down the port of any traffic with source MAC address of 0018.DE8B.4BF8. 

Answer:

Explanation: 

The first command configurs the maximum number of secure MAC addresses on a port to one. The next command specifies that MAC addresses that are allowed with port security; in this case it is just the one single device MAC. If any other device connects on that port the port will be shut down by the port security feature. 


Improve 100-105 test question:

Q96. - (Topic 3) 

Which two of these statements are true of IPv6 address representation? (Choose two.) 

A. There are four types of IPv6 addresses: unicast, multicast, anycast, and broadcast. 

B. A single interface may be assigned multiple IPv6 addresses of any type. 

C. Every IPv6 interface contains at least one loopback address. 

D. The first 64 bits represent the dynamically created interface ID. 

E. Leading zeros in an IPv6 16 bit hexadecimal field are mandatory. 

Answer: B,C 

Explanation: 

A single interface may be assigned multiple addresses of any type (unicast, anycast, 

multicast). 

Every IPv6-enabled interface must contain at least one loopback and one link-local 

address. 

Optionally, every interface can have multiple unique local and global addresses. 

IPv6 host addresses can be assigned in multiple ways: 

Static configuration 

Stateless autoconfiguration 

DHCPv6 

When IPv6 is used over Ethernet networks, the Ethernet MAC address can be used to 

generate the 64-bit interface ID for the host. This is called the EUI-64 address. 

Since MAC addresses use 48 bits, additional bits must be inserted to fill the 64 bits 

required. 

Reference: 

http://www.cisco.com/en/US/technologies/tk648/tk872/technologies_white_paper0900aecd 

8026003d.pdf 


Q97. - (Topic 5) 

Select three options which are security issues with the current configuration of SwitchA. (Choose three.) 

A. Privilege mode is protected with an unencrypted password 

B. Inappropriate wording in banner message 

C. Virtual terminal lines are protected only by a password requirement 

D. Both the username and password are weak 

E. Telnet connections can be used to remotely manage the switch 

F. Cisco user will be granted privilege level 15 by default 

Answer: A,B,D 


Q98. - (Topic 1) 

What must occur before a workstation can exchange HTTP packets with a web server? 

A. A UDP connection must be established between the workstation and its default gateway. 

B. A UDP connection must be established between the workstation and the web server. 

C. A TCP connection must be established between the workstation and its default gateway. 

D. A TCP connection must be established between the workstation and the web server. 

E. An ICMP connection must be established between the workstation and its default gateway. 

F. An ICMP connection must be established between the workstation and the web server. 

Answer:

Explanation: 

HTTP uses TCP port 80, and a TCP port 80 connection must be established for HTTP communication to occur. http://pentestlab.wordpress.com/2012/03/05/common-tcpip-ports/ 


Q99. - (Topic 7) 

Which option is a valid hostname for a switch? 

A. Switch-Cisco 

B. Switch-Cisco! 

C. SwitchCisco 

D. SwitchCisc0 

Answer:


Q100. - (Topic 4) 

When configuring NAT, the Internet interface is considered to be what? 

A. local 

B. inside 

C. global 

D. outside 

Answer:

Explanation: 

The first step to deploy NAT is to define NAT inside and outside interfaces. You may find it easiest to define your internal network as inside, and the external network as outside. However, the terms internal and external are subject to arbitration as well. This figure shows an example of this. 

2a.gif 

Reference: http://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/13772-12.html#topic2