[2021-New] Cisco 100-105 Dumps With Update Exam Questions (6-15)

100-105 Dumps

100-105 Exam Questions - Online Test

100-105 Premium VCE File

Learn More 100% Pass Guarantee - Dumps Verified - Instant Download
150 Lectures, 20 Hours

P.S. Printable 100-105 questions are available on Google Drive, GET MORE: https://drive.google.com/open?id=10aMCxNhtGaQ1g5X4WURwuSZDkYQMo5JZ

New Cisco 100-105 Exam Dumps Collection (Question 6 - Question 15)

Q1. 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: B

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.

Q2. Which layer of the OSI model controls the reliability of communications between network devices using flow control, sequencing and acknowledgments?

A. Physical

B. Data-link

C. Transport

D. Network

Answer: C

Q3. R1 is configured with the default configuration of OSPF. From the following list of IP addresses configured on R1, which address will the OSPF process select as the router ID?

A. 192.168.0.1

B. 172.16.1.1

C. 172.16.2.1

D. 172.16.2.225

Answer: A

Explanation:

The Router ID (RID) is an IP address used to identify the router and is chosen using the following sequencE.

+ 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.

+ The router ID can be manually assigned

In this case, because a loopback interface is not configured so the highest active IP address 192.168.0.1 is chosen as the router ID.

Q4. Which statement is true?

A. An IPv6 address is 64 bits long and is represented as hexadecimal characters.

B. An IPv6 address is 32 bits long and is represented as decimal digits.

C. An IPv6 address is 128 bits long and is represented as decimal digits.

D. An IPv6 address is 128 bits long and is represented as hexadecimal characters.

Answer: D

Explanation:

http://www.cisco.com/en/US/technologies/tk648/tk872/technologies_white_paper0900aecd 8026003d.pdf

One of the key advantages IPv6 brings is the exponentially larger address space. The following will outline the basic address architecture of IPv6.

128-bit-long addresses Represented in hexadecimal format:

Uses CIDR principles: prefix/prefix length x:x:x:x:x:x:x:x, where x is a 16-bit hex field The last 64 bits are used for the interface ID

Q5. 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: E

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.

Q6. Refer to the exhibit.

A problem with network connectivity has been observed. It is suspected that the cable connected to switch port Fa0/9 on Switch1 is disconnected. What would be an effect of this cable being disconnected?

A. Host B would not be able to access the server in VLAN9 until the cable is reconnected.

B. Communication between VLAN3 and the other VLANs would be disabled.

C. The transfer of files from Host B to the server in VLAN9 would be significantly slower.

D. For less than a minute, Host B would not be able to access the server in VLAN9. Then normal network function would resume.

Answer: D

Explanation:

Because Switch1 has multiple redundant links in this network, traffic would not work for less than a minute, and then it would get rerouted along the longer path to the host. The 1 minute outage would be the length of time it takes STP to converge.

Q7. Refer to the exhibit.

After configuring two interfaces on the HQ router, the network administrator notices an error message. What must be done to fix this error?

A. The serial interface must be configured first.

B. The serial interface must use the address 192.168.1.2

C. The subnet mask of the serial interface should be changed to 255.255.255.0

D. The subnet mask of the FastEthernet interface should be changed to 255.255.255.240

E. The address of the FastEthernet interface should be changed to 192.168.1.66

Answer: D

Explanation:

The IP address 192.168.1.17 255.255.255.0 specifies that the address is part of the 192.168.1.0/24 subnet

24 mask bits = 255.255.255.0

28 mask bits = 255.255.255.240

192.168.1.0/24 subnet has a host range of 192.168.1.1 to 192.168.1.254 (0 being network and 255 being broadcoast)

192.168.1.17/28 subnet has a host range of 192.168.1.17 to 192.168.1.30 (16 being network and 31 being broadcast)

192.168.1.65/28 subnet has a host range of 192.168.1.65 - 192.168.1.78 (64 being network and 79 being broadcast)

if fa0/0 was left as /24, you can see that the host range includes the host range of 192.168.1.64/28 which conflicts. Simply speaking, you can't overlap the subnets. By changing the subnet mask of fa0/0 to 255.255.255.240, these networks would no longer overlap.

Q8. Which three approaches can be used while migrating from an IPv4 addressing scheme to an IPv6 scheme? (Choose three)

A. static mapping of IPv4 address to IPv6 addresses

B. configuring IPv4 tunnels between IPv6 islands

C. use DHCPv6 to map IPv4 addresses to IPv6 addresses

D. use proxying and translation (NAT-PT) to translate IPv6 packets into IPv4 packets

E. configure IPv6 directly

F. enable dual-stack routing

Answer: B,D,F

Explanation:

Connecting IPv6 islands with tunnels

An IPv6 island is a network made of IPv6 links directly connected by IPv6 routers. In the early days of IPv6 deployment, there are many IPv6 islands. IPv6 in IPv4 tunnels are used to connect those islands together. In each island, one (or more) dual stack routers are designated to encapsulate and decapsulate IPv6 packets within IPv4 packets. Different mechanisms have been developed to manage tunnels: automatic tunnels3, configured tunnels3, tunnel brokers3, 6over43, 6to43,...

Reference 2:

http://www.petri.co.il/ipv6-transition.htm

Network Address Translation - Protocol Translation (NAT-PT)

The NAT-PT method enables the ability to either statically or dynamically configure a translation of a IPv4 network address into an IPv6 network address and vice versa. For those familiar with more typically NAT implementations, the operation is very similar but includes a protocol translation function. NAT-PT also ties in an Application Layer Gateway (ALG) functionality that converts Domain Name System (DNS) mappings between protocols.

Dual Stack

The simplest approach when transitioning to IPv6 is to run IPv6 on all of the devices that are currently running IPv4. If this is something that is possible within the organizational network, it is very easy to implement.

However, for many organizations, IPv6 is not supported on all of the IPv4 devices; in these situations other methods must be considered.

Reference: http://www.opus1.com/ipv6/howdoitransitiontoipv6.html

Q9. Why do large OSPF networks use a hierarchical design? (Choose three.)

A. to decrease latency by increasing bandwidth

B. to reduce routing overhead

C. to speed up convergence

D. to confine network instability to single areas of the network

E. to reduce the complexity of router configuration

F. to lower costs by replacing routers with distribution layer switches

Answer: B,C,D

Explanation:

OSPF implements a two-tier hierarchical routing model that uses a core or backbone tier known as area zero (0). Attached to that backbone via area border routers (ABRs) are a number of secondary tier areas.

The hierarchical approach is used to achieve the following:

u2711 Rapid convergence because of link and/or switch failures

u2711 Deterministic traffic recovery

u2711 Scalable and manageable routing hierarchy, reduced routing overhead.

Q10. If a host experiences intermittent issues that relate to congestion within a network while remaining connected, what could cause congestion on this LAN?

A. half-duplex operation

B. broadcast storms

C. network segmentation

D. multicasting

Answer: B

Explanation:

A broadcast storm can consume sufficient network resources so as to render the network unable to transport normal traffic.

P.S. Easily pass 100-105 Exam with Dumpscollection Printable Dumps & pdf vce, Try Free: http://www.dumpscollection.net/dumps/100-105/ (347 New Questions)