You are on page 1of 38

100-101 ICND1

Interconnecting Cisco Networking Devices Part 1

100-101 ICND1 Exam Information

Cisco Training & Certifications
The Specialist designation certifies the specific expertise of technical
professionals, including those with Cisco Career Certifications at the
associate, professional or expert levels. By earning specialist
certifications, network professionals can enhance their core networking
knowledge in technologies such as security, data center or video.
Many Specialist certifications align with the requirements of the Cisco
Partner Specialization program.

Cisco 100-101 (ICND1) Exam Training

Course Description
Please note this course is the 1st part to gaining full
CCNA certification, part two of this exam training, Cisco
100-101, (ICND2), is available here with 9 Chapters.
Chapter 1 – Understanding Networks
and their Building Blocks
Chapter 2 – IP Addressing and Subnets
Chapter 3 Introduction to Cisco Routers,
Switches and IOS
Chapter 4 Introduction to IP Routing
Chapter 5 Introduction to OSPF
Chapter 6 Switching and Spanning Tree
Chapter 7 VLANs and VTP
Chapter 8 – Access Lists
Chapter 9 – Network Address
Translation (NAT)

About This Course

This Cisco 100-101 (ICND1) training course from Infinite Skills prepares
you for the Interconnecting Cisco Networking Devices Part 1 exam. The
ICND1 exam gives you your CCENT (Cisco Certified Entry Networking
Technician) certification, and is a required exam for achieving your full
CCNA Routing and Switching certification. This tutorial covers the topics
recommended by Cisco for the 100-101 (ICND1) exam.
The Cisco 100-101 exam tests your knowledge of the network
fundamentals required to install, operate, and troubleshoot a small
branch office network. This video tutorial covers all of the recommended
topics for this exam; operation of IP data networks, LAN switching
technologies, IPv4 and IPv6, Routing Technologies, DHCP, NAT and ACLs,
network device security and basic troubleshooting.
Once you have completed this computer based video training course, you
will have a thorough understanding of the concepts you need for passing
the Cisco 100-101 (ICND1) exam. You will also be able to apply these
concepts to building and managing a real-life client network.

How to take the Cisco 100-101
(ICND1) Exam

1. Find a test center near you ( to take the
Cisco 100-101 (ICND1) certification exam, their will provide details on test
center locations and schedules. This exam is typically priced around $150
2. Study the required material to pass the Cisco 100-101 (ICND1)
examination. This course covers the material that is within the Cisco 100101 (ICND1) certification exam, and will help put you in a great position to
succeed in the exam
3. Pass your exam!
4. Tell your friends how easy passing the Cisco 100-101 (ICND1) exam was
using Infinite Skills training courses

What are the Requirements?

What are the requirements?
• A Desire To Learn
What am I going to get from this course?
• Over 76 lectures and 6.5 hours of content!
• Prepare Yourself For The Cisco Networking Devices
Part 1 Exam
What is the target audience?
• Any One Who Wishes To Become CCNA Certified
What you get with this course?

Introduction to Networks (1)

Before you learn Cisco Internet working, it is important to understand what a
network is and the importance of networks themselves. Simply put, a network is a
collection of interconnected devices (such as computers, printers, etc.). To
understand the importance of networks, let us look at how things worked before
networks were created. For this, consider a large multinational company that sells
food products in a time when networks did not exist.
Let us call this company ABC Inc. Imagine the amount of information such as sales,
inventory, etc. required by the management of the company to make everyday
decisions. To get this information they will need to call their local offices. Their local
offices will need to mail (postal!) or fax printed reports or even send media
(floppies!) though the postal service. By the time the mail is received, the data is
already days old. Even if reports are faxed, it will be a cumbersome task to
consolidate all reports. This task also increases chance of human error since large
numbers of reports are manually collated. This is just one part of the equation. You
also need to consider the information required by the local offices. They also need
various data from the head office and other offices around the world.

Introduction to Networks (2)

Now consider the same company, but in the present time with all their offices
interconnected. They would use a single application around the world that takes advantage
of their global network. The data from all offices would be instantly stored at the central
location and with a single click, the management team can see data from around the world
in any format they like. This data would also be real-time. This means that they see it as its
happening. Since the data is centralized, any office location can see data pertaining to any
As you can see, the cost, time and effort involved in transferring data was much higher
without networks. So networks decrease cost, time, and effort and thereby increase
productivity. They also help in resource optimization by helping to share resources. A simple
example of resource sharing is a printer in a typical office. Without networks, each computer
would require a dedicated printer. However with a network, the printer can be shared
between many different computers.
Now that you know how beneficial networks are, its time to look at how networks work.
Figure 1-1 shows the most basic form of a network. This figure shows two hosts (end-user
devices such as computers are commonly called hosts in networking terms) directly
connected to each other using a networking cable. Today every host has a Network Interface
Card (NIC) that is used to connect it to a network.

Introduction to Networks (3)

One end of the network cable connects to the NIC on a host and the
other connects to the network. In this case, the cable directly
connects to another host. At this stage do not worry about network
cables and how the hosts communicate across the network. This
will be covered in detail later in the chapter. At this stage it is
important to understand how hosts connect to a network.
In Figure 1-1, the hosts are “networked” and can share
information. This network is effective, but not scalable. If you have
more than 2 hosts to this “network”, it will not work without a
separate NIC card for each connection and that is not scalable or
realistic. For more than 2 hosts to be networked, you require a
network device such as a hub. Figure 1-2 shows three hosts
connected to a hub.

Introduction to Networks (4)

A hub is a network device that repeats information received from a host to all other connects hosts. In Figure
1-2 the hub will relay any information received from HostA to HostB and HostC. This means that all the three
hosts can communicate with each other. Communication between hosts can be classified into three types:
Unicast – Communication from one host to another host only.
Broadcast – Communication from one host to all the hosts in the network.
Multicast – Communication from one host to few hosts only.
When a hub is used to network hosts, there are two problems that arise:
A hub repeats information received from one host to all the other hosts. To understand this, consider HostA
in Figure 1-2 sending a unicast message to HostB. When the hub receives this message; it will relay the
message to both HostB and HostC. Even though the message was a unicast intended only for HostB, HostC
also receives it. It is up to HostC to read the message and discard it after seeing that the message was not
intended for it.
A hub creates a shared network medium where only a single host can send packets at a time. If another host
attempts to send packets at the same time, a collision will occur. Then each device will need to resend their
packets and hope not to have a collision again. This shared network medium is called a single collision
domain. Imagine the impact of having a single collision domain where 50 or 100 hosts are connected to hubs
that are interconnected and they are all trying to send data. That is just a recipe for many collisions and an
inefficient network.
The problems associated with hubs can cause severe degradation of a network. To overcome these, switches
are used instead of hubs. Like hubs, switches are used to connect hosts in a network but switches break up
collision domain by providing a single collision domain for every port. This means that every host (one host
connects to one port on the switch) gets its own collision domain thereby eliminating the collisions in the
network. With switches, each host can transmit data anytime. Switches simply “switch” the data from one
port to another in the switched network. Also, unlike hubs, switches do not flood every packet out all ports.
They switch a unicast packet to the port where the destination host resides. They only flood out a broadcast
packet. Figure 1-3 shows a switched network.

Introduction to Networks (5)

Remember that each host in Figure 1-3 is in its own collision domain and if HostA sends a packet to
HostC, HostB will not receive it.
Figure 1-4 and 1-5 show two networks. See if you can figure out how many collision domains exist in

Introduction to Networks (6)
If you answered 5 for Figure 1-4, then you are absolutely correct since each
port of the Switches represent a single collision domain. If you answered more
than 5 then you need to remember that a hub does not break collision
domains. Similarly, Figure 1-5 has 7 collision domains.
Now that you know how a switch works and improves a network, consider the
one problem associated with a switched network. Earlier, you learned that
hubs flood out all packets, even the unicast ones. A switch does not flood out
unicast packets but it does flood out a broadcast packet. All hosts connected to
a switched network are said to be in the same broadcast domain. All hosts
connected to it will receive any broadcast sent out in this domain. While
broadcasts are useful and essential for network operations, in a large
switched network too many broadcasts will slow down the network. To
remedy this situation, networks are broken into smaller sizes and these
separate networks are interconnected using routers. Routers do not allow
broadcasts to be transmitted across different networks it interconnects and
hence effectively breaks up a broadcast domain. Figure 1-6 shows three
switched networks interconnected by a router.

Introduction to Networks (7)

In the network shown in Figure 1-6, broadcasts from hosts
connected to Switch1 will not reach hosts connected to Switch2
or Switch3. This is because the router will drop the broadcast on
its receiving interface.
In addition to breaking up broadcast domains, routers also
perform the following four essential functions in your network:
 Packet Switching – At the barest minimum, routers are like
switches because they essentially switch packets between
 Communication between Networks – As shown in Figure 1-6,
routers allow communication between networks connected
to it.
 Path Selection – Routers can talk to each other to learn about
all the networks connected to various routers and then select
the best path to reach a network. This is function is discussed
in detail later in the book.
 Packet Filtering – Routers can drop or forward packets based
on certain criteria like their source and destination. This is
also discussed in detail later in the book.

Routing and Switching

Cisco Certified Entry Networking Technician (CCENT) validates
the ability to install, operate and troubleshoot a small enterprise
branch network, including basic network security. With a CCENT,
a network professional demonstrates the skills required for
entry-level network support positions - the starting point for
many successful careers in networking. The curriculum covers
networking fundamentals, WAN technologies, basic security and
wireless concepts, routing and switching fundamentals, and
configuring simple networks. CCENT is the first step toward
achieving CCNA, which covers medium-size enterprise branch
networks with more complex connections.

CCENT Exams & Recommended
With three levels of membership, Cisco Learning Network
(CLN) Premium can help you tailor an exam study strategy
that allows you to progress at your own speed, based upon
your individual needs.
Take the time you need to thoroughly prepare for your exams.
Take a few months or up to a year to prepare for your exam(s).
Select from three distinct levels, available in a variety of
subscription lengths, to customize your study experience.

Try a short-term subscription to achieve more immediate goals.
Subscribe for a one-year offering to get continual access to new content
and to get discounts on select learning products.
Visit the product pages below to learn more about a CLN Premium

Topic break down

Individuals who get formal training on Cisco technologies
demonstrate higher productivity, make fewer errors and
possess more of the skills valued by employers and
customers than those who receive only on-the-job training.
Individuals who get formal Cisco training will:
 Improve speed, depth and quality of all customer
 Learn to manage Cisco networks through labs
 Experience real-life scenarios during their Cisco training
 Gain the knowledge to build an effective workforce
through network utilization

Cisco 100-101 Practice Test
Topic 1, Operation of IP Data Networks

Question No : 1 - (Topic 1)
Which OSI layer header contains the address of a
destination host that is on another network?
A. application
B. session
C. transport
D. network
E. data link
F. physical


Explanation: Explanation/Reference:
Only network address contains this information. To transmit
the packets the sender uses network address and datalink
address. But the layer 2 address represents just the address
of the next hop device on the way to the sender. It is
changed on each hop. Network address remains the same.

Cisco 100-101 Practice Test

Question No : 2 - (Topic 1)


Cisco 100-101 Practice Test
Topic 2, LAN Switching Technologies

Question No : 3 - (Topic 2)

A switch has 48 ports and 4 VLANs. How many
collision and broadcast domains exist on the switch
(collision, broadcast)?
A. 4, 48
B. 48, 4
C. 48, 1
D. 1, 48
E. 4, 1

48, 4

A switch uses a separate collision domain for each port, and
each VLAN is a separate broadcast domain.

Cisco 100-101 Practice Test
Question No : 4 - (Topic 2)
Refer to the exhibit.

All devices attached to the network are shown. How many
collision domains are present in
this network?
A. 2
B. 3
C. 6
D. 9
E. 15
Answer: 15

Cisco 100-101 Practice Test
Topic 3, IP addressing (IPv4 / IPv6)

Question No : 5 - (Topic 3)
Which one of the following IP addresses is the last
valid host in the subnet using mask

Explanation: Explanation/Reference
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.

Cisco 100-101 Practice Test
Topic 4, IP Routing Technologies

Question No : 6 - (Topic 4)
Refer to the exhibit.

Which command would you use to configure a static route on
Router1 to network with a nondefault
administrative distance?
A. router1(config)#ip route 1
B. router1(config)#ip route 1
C. router1(config)#ip route 5
D. router1(config)#ip route 5

router1(config)#ip route 5

Cisco 100-101 Practice Test
Topic 5, IP Services

Question No : 7 - (Topic 5)


Cisco 100-101 Practice Test
Topic 7, Troubleshooting

Question No : 8 - (Topic 7)
Refer to the exhibit.

A person is trying to send a file from a host on Network A of the
JAX Company to a server on Network Z of the XYZ Company.
The file transfer fails. The host on Network A cancommunicate
with other hosts on Network A. Which command, issued from
router RTA, would be the most useful for troubleshooting this
A. show flash:
B. show history
C. show version
D. show interfaces
E. show controllers serial

show interfaces

Cisco 100-101 Practice Test
Topic 8, OSPF Questions

Question No : 9 - (Topic 8)
Refer to the graphic.

R1 is unable to establish an OSPF neighbor relationship with R3.
What are possible reasons for this problem?
(Choose two.)
A. All of the routers need to be configured for backbone Area 1.
B. R1 and R2 are the DR and BDR, so OSPF will not establish
neighbor adjacency with R3.
C. A static route has been configured from R1 to R3 and prevents
the neighbor adjacency from being established.
D. The hello and dead interval timers are not set to the same
values on R1 and R3.
E. EIGRP is also configured on these routers with a lower
administrative distance.
F. R1 and R3 are configured in different areas.

The hello and dead interval timers are not set to the same values on
R1 and R3.
R1 and R3 are configured in different areas.

Cisco 100-101 Practice Test
Question No : 10 - (Topic 8)
Refer to the topology. Your company has decided to connect the
main office with three other remote branch offices using pointto-point serial links.
You are required to troubleshoot and resolve OSPF neighbor
adjacency issues between the main office and the routers
located in the remote branch offices.

Cisco 100-101 Practice Test
Question No : 10 - (Topic 8)

Cisco 100-101 Practice Test
Question No : 10 - (Topic 8)

Cisco 100-101 Practice Test
Question No : 10 - (Topic 8)

Cisco 100-101 Practice Test
Question No : 10 - (Topic 8)

R1 does not form an OSPF neighbor adjacency with R2. Which
option would fix the issue?
A. R1 ethernetO/1 is shutdown. Configure no shutdown
B. R1 ethernetO/1 configured with a non-default OSPF hello
interval of 25: configure no ip ospf hello-interval 25
C. R2 ethernetO/1 and R3 ethernetO/O are configured with a
non-default OSPF hello interval of 25; configure no ip ospf hellointerval 25
D. Enable OSPF for R1 ethernetO/1; configure ip ospf 1 area 0
command under ethernetO/1

Cisco 100-101 Practice Test
Question No : 10 - (Topic 8)

R1 ethernetO/1 configured with a non-default OSPF
hello interval of 25: configure no ip ospf hello-interval 25
Looking at the configuration of R1, we see that R1 is
configured with a hello interval of 25 on interface Ethernet 0/1
while R2 is left with the default of 10 (not configured).

Free CCNP Security Training Classes

The Cisco Certified Networking Associate (CCNA) certification is
the perfect starting point for emerging network engineers
looking to enhance their foundational networking knowledge.
Our free, online, self-paced CCNA training teaches students to
install, configure, troubleshoot and operate LAN, WAN and dial
access services for medium-sized networks. You’ll learn how to
describe the operation of data networks, how to implement an
IP addressing scheme, how to solve networking challenges with
switched LAN technology and you will go in depth on the 7
network layers. Those who work as system engineers, field
technicians, network administrators and help desk support
specialists will benefit greatly from our free CCNA certification
training. Take the next step in developing your IT networking
career and start training here, online for your CCNA certification
today, for free.

Quality and Value




We beleive in Quality material. All of our Questions
and Answers are well shaped in PDF and Simulator
format. These products are realy worth of your

Tested and Approved

Valid and accurate study material by All of our products Q&A
are tested and approved by our experts.

Guaranteed to Pass

Test inside ensure your 100% passing
Guarantee. We provide you all latest and
updated exam questions and answers which
are easy to learn in PDF and Testing Engine

Try Before Buy

100% Success is ensured as per Money back
Guarantee Moreover we have also offer Free
demos on request so you can use them and
verify the standard, quality and accuracy.

Become Certified From