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CCNA v1.1 Exam Review: Critical Concepts of the 640-802 CCNA Exam
Abstract
On June 25, 2007, Cisco announced major updates to their Cisco Certified Network Associate (CCNA) curricula, including the new version of the CCNA Composite Exam 640-802 CCNA. In late 2010, Cisco did a "minor revision" of the CCNA curricula, which includes discussion of some newer technologies. The CCNA exam number did not change with the latest curriculum revision. The two courses that comprise the CCNA exam preparation curricula are Interconnecting Cisco Networking Devices Part 1 and Part 2. Global Knowledge also offers a CCNA Boot Camp (CCNAx), which is also at version 1.1.
To reflect these changes, we have updated our popular overview, CCNA Review, to bring you CCNA v1.1 Review. This paper can help students understand what types of information would be required to pass the new version of the composite exam by providing a convenient review of the exam's critical concepts.
Sample
This paper can help students understand what types of information would be required to pass the latest version of the CCNA exam, by providing a convenient review of the exam's critical concepts.
Please Note: This document is intended to help students understand what types of information would be required to pass the CCNA test. This is only intended as a review and additional training and knowledge would be needed in order to take and pass the CCNA exam. This document does not help with the simulation portion of the test.
OSI Model Layers
| OSI Layer | Purpose | Examples |
| Application | Provides services to network applications. This layer is responsible for determining resource availability, identifying communication peers, and synchronizing communication between the applications. |
Simple Mail Transport Protocol (SMTP) Telnet File Transfer Protocol (FTP) Trivial File Transfer Protocol (TFTP) HyperText Transfer Protocol (HTTP) |
| Presentation | Provides the coding and conversion functions that are applied to the data to/from the application layer. This layer ensures that there is a common scheme used to bundle the data between the two ends. |
ASCII (text) EBCDIC (text) JPEG (image) GIF (image) TIFF (image) MPEG (sound/video) Quicktime (sound/video) |
| Session | Establishing, maintaining, and terminating communications sessions between upper layer applications. |
Session Control Protocol (SPC) Remote Procedure Call (RPC) from Unix Zone Information Protocol (ZIP) from AppleTalk |
| Transport | Responsible for end-to-end data transmission. Can be either reliable (connection-oriented) or best effort (connectionless). This layer organizes data from various upper layer applications into data streams, handles end-to-end flow control, multiplexing, virtual circuit management, and error checking and recovery. |
Transmission Control Protocol (TCP) from IP User Datagram Protocol (UDP) from IP |
| Network | This layer allows both connection-oriented and connectionless data flows to access the network. The network layer addresses help define a network hierarchy. Network devices are normally grouped together based on their common network layer address. |
Internet Protocol (IP) |
| Data Link | Provides either reliable or best effort transmission of data across a physical medium. Most networks use a best effort data link layer, such as Ethernet. The data Link Layer for LANs provides a physical address to each device called a Media Access Control (MAC) address. MAC addresses are typically burned into the network interface card (NIC). The LAN data link layer also uses a Logical Link Control (LLC) to indicate the type of network layer data that is encapsulated inside the frame. | LAN: Ethernet/IEEE 802.3 (include Fast Ethernet) 802.3z (Gigabit Ethernet) Token Ring/IEEE 802.5 FDDI (from ANSI) WAN: |
| Physical | Defines the electrical, mechanical, and functional specifications for maintaining a physical link between network devices. This layer is responsible for such characteristics as voltage levels, timing and clock rates, maximum transmission distances, and the physical connectors used. | LAN:
Category 3 cabling (LAN) Category 5 cabling (LAN) WAN: |
OSI Model versus TCP/IP Protocol Suite
| OSI Model Layer Number | OSI Model Layer | TCP/IP Protocol Suite Layer | Protocol Data Unit | Network Device |
| 7 | Application | Application | Data | |
| 6 | Presentation | |||
| 5 | Session | |||
| 4 | Transport | Transport | Segment | |
| 3 | Network | Internet | Packet (or Data-gram) | MultiLayer Switch or Router |
| 2 | Data Link | Data Link | Frame | Switch or Bridge |
| 1 | Physical | Physical | Bits | Hub |
TCP/IP Transport Layer Protocols
Transmission Control Protocol (TCP) is a reliable, connection-oriented, protocol that uses sequence and acknowledgement numbers to provide reliability. TCP verifies that the remote end is listening prior to sending data, using a 3-way handshake: SYN, SYN/ACK, ACK.
User Datagram Protocol (UDP) is a best-effort, connectionless, protocol that does not have sequence or acknowledgement numbers, and does not do far-end verification.
Related Courses
ICND1 - Interconnecting Cisco Network Devices 1
ICND2 - Interconnecting Cisco Network Devices 2
CCNAX - CCNA Boot Camp v1.1
Related White Papers
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