Networking (CCNA)

CCNA:

Networking is a very interesting think.  If you want to learn networking please follow this process. CCNA is top course of networking.  CCNA is an International vendor course. It have four(4) modules . You lesson carefully and parties more and more.

Necessary Software :

For lab parties use: Packet Tracer 5.1

                          Install _flash_player 

                                    Contact for half :+8801712783168

Introduction:

‘’Welcome  to the CCNA Exploration Network Fundamentals course. The goal of this course  is to introduce you to fundamental  networking concepts and technologies. These online course materials will assist  you in developing the skills necessary  to plan and implement small networks  across a range of applications’’.    

Switch: Send data to specific address.

Hub: Broadcast data.

Ethernet: Connected a local land.

IPv4: 32 bit long integers.

IPv6: 128 bit long integers.

Connection:

            Same device: Cross cable.

            Different device: Straight cable.

Routing:

            Two major duties- (a). Forwarding and (b). Integration.

Component:

            Data communication system has five component-

(1)   Protocol.

(2)   Sender.

(3)   Medium.

(4)   Message.

(5)   Reciver.

Topology:

            Mainly four types topology –

(a)   Mesh topology.

(b)   Star topology.

(c)    Bus topology.

(d)   Ring topology.

OSI Model:

            Have seven layer –

(1)   Physical layer.

(2)   Data link layer.

(3)   Network layer.

(4)   Transport layer.

(5)   Session layer.

(6)   Presentation layer.

(7)   Application layer.

Server:

            Roll over each server for a brief description of network services provided:

                        DNS Server: Domain name server.

                        Telnet server: Administrators.

                        E-mail server: Send e-mail massages from clients to servers over the internet.

                        DHCP Server: Assign the IP address.

                        Web Server: Transfer information between web clients and web servers.

                        Ftp Server: Download and upload of file between a client and server.

Port numbers:

            DNS: TCP/UDP port 53.

            HTTP: TCP port 80.

            SMTP: TCP port 25.

            POP: TCP port 110.

Telnet: TCP port23.

DHCP:  UDP ports 67 and 68.

FTP: TCP ports 20 and 21.

IP address:

Unique address, that defines a host in a particular network. Have two parts –

(1). Network ID and

(2). Host ID.

Class:

            Five classes are divided IP address-

                        Class A: Rang 0 – 127.

                        Class B: Rang 128 – 191.

                        Class C: Rang 192 – 223.

                        Class D: Rang 224 – 239.

                        Class E: Rang 240 – 255.

Masking / Subnating:

            It’s a very important part for CCNA. This part not easy some difficult. Also called VLSM calculation. Example: 191.239.21.53/25

            Hear, Net ID: 191.239.21.0

                        Broadcast ID: 191.239.21.127

                        First usable Host address: 191.239.21.1

                        Last usable host address: 191.239.21.126

                        Next Network ID: 191.239.21.128

Dynamic Routing Configuration:

            Use Packet Tracer 5.1 software.

                        Configure: click Router > CLT> No> enter> enter> enable> configurterminal> intface> fastethernet 0/0> ip address 10.5.0.1 255.255.224.0> no shut> end.

Bandwidth:

            Digital bandwidth measures the amount of information that can flow from one place to another in a given amount of time.

            Bandwidth is typically measured in kilobits per second (kbps) or megabits per second (mbps).

IOS Primary Modes:

            User EXEC Mode: Limited examination or router remote access

                                                Switch>

                                                Router>

            Global Configuration Mode: Global configuration commands

                                                Switch (config) #

                                                Router (Config) #

            Privilieged EXEC Mode: Detailed examination of router, Debugging and testing. File manipulation. Remote access.

                                                Switch #

                                                Router #

Other configuration Modes: Specific service or interface configuration.

                                                Switch (config-mode) #

                                                Router (config-mode) #

Rip and RipV2:

            Rip: Not include the subneting mask and do not support VLSM (Variable Length Subnet Masking). Example: Router for the directly connected network –

                        R3 (config) # router rip

                        R3 (config-router) # network 192.168.4.0

                        R3 (config-router) # network 192.168.5.1

            RipV2: Include the subnet mask and support VLSM. Example:

                        R3 (config) # router rip

                        R3 (config) # version2

                        R3 (config) # no auto-su-

                        R3 (config-router) # network 10.3.3.2

                        R3 (config-router) # network 192.168.2.0

Global Configuration:

EIGRP: Mean Enhanced Interior Gateway Routing Protocol. Cisco proprietary protocols and operate on Cisco Routers.

EIGRP command or autonomous system number –

            Zakir (config)# router eigrp 1

            Zakir (config-router)# network 172.16.0.0  0.0.0.3 (widcard mask)

            Zakir (config-router)# network 172.168.10.0   (widcard mask)

Real Global Configuration:

            OSPF: Mean Open Shortest Path First. Configure OSPF on the R1, R2, and R3 router-

                        R1 (config) # router ospf 1

                        R1 (config-router) # network 172.16.1.16 0.0.0.15 area 0

                        R1 (config-router) # network 192.168.10.0 0.0.0.3area 0

                        R1 (config-router) # network 192.168.10.0 0.0.0.15 area 0

                        R1 (config-router) # end

This is simple overview for you. If you interested learn more and more please go this away – http://cisco.netacad.net I hope you must success.