2. Prepared by: PACE Academy (www.pace.net.pk) Welcome to CCNAX Cisco Certified Network Associate Version 2 (200-120) 2 2 1.1Recognize the purpose and functions of various network devices such as routers, switches, bridges and hubs 1.2Select the components required to meet a given network specification 1.3Identify common applications and their impact on the network 1.4Describe purpose and basic operation of the protocols in OSI and TCP/IP models 1.5Predict the data flow between two hosts across a network 1.6Identify the appropriate media, cables, ports, and connectors to connect Cisco network devices to other network devices and hosts in a LAN 1.OOperation of IP Data Networks

3. Prepared by: PACE Academy (www.pace.net.pk) 3 3 Network Devices  Hub  Repeater  Bridge  Modem  L2 Switch  Layer 3 Switch  Router  ISR Router  Firewall

4. Prepared by: PACE Academy (www.pace.net.pk) 4 4 Open Systems Interconnection Model Established in 1947, the International Standards Organization (ISO). IEEE (Institute of Electrical and Electronics Engineers) created the OSI which is the ISO standard that covers all aspects of network communications. It was first introduced in the late 1970s. Guide to different vendors so that multiple products will work with each other.

5. Prepared by: PACE Academy (www.pace.net.pk) 5 5 1.Physical Layer  Data Encoding. It sends bits and receives bits. Frame Delimiter define here.  Physical Medium Attachment/Transmission. DCE/DTE. USB · Bluetooth · Hubs · Repeaters · Cables.  Transmission Technique. Baseband (Digital) or Broadband (Analog). Modulation.  Physical Topologies. Defined by the OSI.

6. Prepared by: PACE Academy (www.pace.net.pk) 6 6 2.Datalink Layer  Link establishment and termination.  Attaching the framing information (Destination Mac)  Frame sequencing.  Frame acknowledgment.  Frame delimiting.  Frame error checking.  Media access management. When the node "has the right" to use physical medium?  Protocols. HDLC (Point to Point or Multipoint) and LLC: ARP, RARP  Devices. Bridges, Layer 2 switches and NIC  Divided in two layers MAC and LLC

7. Prepared by: PACE Academy (www.pace.net.pk) 7 7 3.Network Layer  Routing  Protocols IP (IPv4 or IPv6) BGP, IS-IS,OSPF, DHCP, IGRP, EIGRP, RIP, RIP2  Devices Firewall, Router, layer 3 Switches

8. Prepared by: PACE Academy (www.pace.net.pk) 8 8 4.Transport Layer  Responsible for Error free Message Delivery Error-free, in sequence, and with no losses or duplications  Segmentation: Segmenting data and adding a header to identify and manage each segment.  Flow Control: Using header information to reassemble segments into applications data.  Connection Control: Passing the assembled data to the correct applications.  Error Control: Re-transmit of failed, time-out and corrupted packets.  Multiplexing and de-multiplexing (over a single virtual circuit) Reliable Transport (ensure that the data received is error free) Connection-Oriented (SYN-ACK 3 way handshake for virtual Circuit) Flow Control (Buffering etc.) Windowing (It controls how much info transferred from one end to other) Acknowledgements (Send ACK when delivery Completed) More overhead (Extra Processing)

9. Prepared by: PACE Academy (www.pace.net.pk) 9 9 5.Session Layer  Manage Session Process Establishment Maintenance Termination  Session support: Performing security Name recognition Logging, and so on.

10. Prepared by: PACE Academy (www.pace.net.pk) 10 6.Presentation Layer The presentation layer formats the data to be presented to the application layer. It can be viewed as the translator for the network.  Character code translation. For example, ASCII to EBCDIC.  Data conversion. Bit order, CR-CR/LF, integer-floating point, and so on.  Data compression. Reduces the number of bits that need to be transmitted on the network.  Data encryption. Encrypt data for security purposes. i.e., password encryption.

11. Prepared by: PACE Academy (www.pace.net.pk) 11 7.Application Layer The Application layer of the OSI model is where users communicate with the computer. The Application layer is responsible for identifying and establishing the availability of the intended communication partner and determining if sufficient resources for the intended communication exist. The user interfaces with the computer at the application layer. It’s major duties are providing service to the users just like:  Resource sharing and device redirection  Remote file access  Remote printer access  Inter-process communication  Network management  Directory services  Electronic messaging (such as mail)  Network virtual terminals

12. Prepared by: PACE Academy (www.pace.net.pk) 12 1.1Recognize the purpose and functions of various network devices such as routers, switches, bridges and hubs 1.2Select the components required to meet a given network specification 1.3Identify common applications and their impact on the network 1.4Describe purpose and basic operation of the protocols in OSI and TCP/IP models 1.5Predict the data flow between two hosts across a network 1.6Identify the appropriate media, cables, ports, and connectors to connect Cisco network devices to other network devices and hosts in a LAN 1.OOperation of IP Data Networks Summary

13. Prepared by: PACE Academy (www.pace.net.pk) 13 'Allahumaf tah alaina hikmataka wanshur alaina rahmataka ya zul jalali wal ikram‘ Translation: 'O Allah, open the gates of knowledge and wisdom for us, and shower upon us your blessings. O Possessor of Majesty and Reverence' 'Allahumaf tah alaina hikmataka wanshur alaina rahmataka ya zul jalali wal ikram‘ Translation: 'O Allah, open the gates of knowledge and wisdom for us, and shower upon us your blessings. O Possessor of Majesty and Reverence'