Cisco Networking (Routing and Switching)

• A computer network or data network is a digital telecommunication
network which allows nodes to share resources.
• In computer networks, networked computing devices exchange data
with each other using a data link. The connections between nodes are
established using either cable media or wireless media.

• Usually networks are categorised on the basis of their area of
operation.

Equipment that connects directly to a network segment is
referred to as a device.
These devices are broken up into two classifications.
• end-user devices
• network devices
End-user devices include computers, printers, scanners, and
other devices that provide services directly to the user.
Network devices include all the devices that connect the end
user devices together to allow them to communicate.

A network interface card (NIC) is a printed circuit board
that provides network communication capabilities to and
from a personal computer. Also called a LAN adapter.

Packet Tracer is a cross-platform visual simulation tool designed by Cisco Systems that
allows users to create network topologies and imitate modern computer networks. The
software allows users to simulate the configuration of Cisco routers and switches using
a simulated command line interface.

About Subnetting & Supernetting
In subnetting, a network is divided into several smaller subnetwork with each
subnetwork(or subnet) having its own subnetwork address.
In supernetting, an organization can combine several class C addresses to create a
larger range of addresses (supernetwork).
SUBNETTING
Class A, B, C in IP addressing are designed with two levels of hierarchy.
The organization has two-level hierarchical addressing, but it cannot have more
than one physical network./ The host cannot be organized into groups, and all of
The hosts are at the same level./ The organization has one network with many
hosts.
One solution to this problem is subnetting, the further division of a network into
smaller networks called subnetworks.

Example of Subnetting
( Example / Class A)
An organization with a class A address at least 1,000 subnetworks. Find the
subnet mask and configuration of each subnetwork.
(Solution)
1. There is a need for at least 1,000 subnetworks.(we need at least 1,002
subnetworks to allow for the all-1s and all-0s subnetids)
2. This means that the minimum number of bits to be allocated for
subnetting should be 10, (29 < 1,002 < 210).
3. 14 bits are left to define the hostids. Subnet mask (11000000 = 192).

Supernetting means assigning a set of class C addresses to an organization that
needs more than 254 host addresses.
However , when these class C addresses are entered into the routing table, each
occupies one entry in the routing table./ 256 entries in the routing table.
The classless interdomain routing(CIDR) technique is devised to
reduce the number of routing table entries.
In this technique, instead of entering each single class C address with its
corresponding default mask(255.255.255.0),the router can use the supernet
mask and the lowest network address in the group.

•Hubs – less expensive,
used in a very small LAN
where low throughput is
OK
•Switches – segments
collision domains,
interconnects network
segments, more
expensive, but
performance makes it
cost effective.

•It is a layer 3 or network
layer device.
•In this there is no
broadcast.
•It is WAN technology
device.
•It is useful to connect
different networks.
•Packet filtering & it finds
the best path selection.

•Routing is the exchange
of routes between
different networks .
•There are three types of
routing:
1. Default routing
2. Static routing
3. Dynamic routing

•A routing protocol is the communication used between
routers.
•A routing protocol allows one router to share information
with other routers.
•The information a router gets from another router, using a
routing protocol, is used to build & maintain a routing
table.
Examples of routing protocols:
1. RIP [ROUTING INFORMATION PROTOCOL]
2. OSPF[OPEN SHORTEST PATH FIRST]

• RIP is a distance vector routing protocol
• Hop count is used as the metric for path selection
• If the hop count is greater than 15, the packet will be
discarded
• By default, routing updates are broadcast every 30
seconds
• RIP has evolved over the years from a Classful Routing
Protocol, RIP Version 1 (RIP v1), to a Classless Routing
Protocol, RIP Version 2 (RIP v2).

• Open Shortest Path First
• Dynamic IGP (Interior
Gateway Protocol)
• Use within your own
network
• Link state algorithm

• 2 End devices
• 1 Network device ( Switch)
• 2 Connections ( Copper Straight Through)

• Ping was send from one end device(192.168.0.100) to another
End device(192.168.0.101) .
• Ping test was successful.

• PC0(source) sends packets to PC1(destination)
• The network device used was switch, which carried out
the whole transfer of packet from PC0 to PC1.

Network Consists of -
• 1 Router
• 2 Switches
• 6 PCs

• PC0,PC1,PC2 are connected with Switch0.
• PC0(192.168.10.2), PC1(192.168.10.3), PC2(192.168.10.4)
• PC3,PC4,PC5 are connected with Switch1.
• PC0(192.168.11.2), PC1(192.168.11.3), PC2(192.168.11.4)
• Swiches0 and 1 are connected with Router0.
• Router is assigned with different IP address for different networks.
• PCs default gateway is set with respect to IP address of router.
• The network is established successfully.

Cisco Networking (Routing and Switching)

Cisco Networking (Routing and Switching)

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Similar to Cisco Networking (Routing and Switching)

Similar to Cisco Networking (Routing and Switching) (20)

Recently uploaded

Recently uploaded (20)

Cisco Networking (Routing and Switching)

Editor's Notes