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CCNA Training School :

The Complete CCNA Training Boot camp Package

Vibrant offers top-quality technical education and certification training in an all-inclusive CCNA Boot Camp course package specifically designed for the needs and ease of our students. We attend to every detail so our students can focus solely on their studies and certification goals.

The Vibrant Camp course package for the CCNA program includes:

• Cisco courseware
• Top-notch instruction
• The unique  time-proven curriculum
• Use of Vibrant Softnet+  self-testing software
• State-of-the-art  educational facilities
• Testing vouchers for testing on-site
• Accommodations
• Breakfasts, lunches, snacks and beverages
• Transportation to and from designated local airports
• Vibrant Boot Camp’s guarantee

CCNA Boot Camp Benefits : CCNA Boot camp Curriculum : CCNA Boot camp Exam Details : CCNA Boot camp

OSI:
The OSI (Open Systems Interconnection) model was created in 1984 by ISO (International Organization for Standardization) in order to provide a network model for vendors so that their products would interoperate on networks. To provide services to the next higher layer, a layer must know about the standard interfaces defined between layers. These interfaces include definition of what Layer N+1 must provide to Layer N to get services, as well as what information Layer N must provide back to layer N+1. Layer N MUST interact with Layer N on the connecting side to successfully implement its function. A common pneumonic device used to help remember the OSI model is (A)ll (P)eople (S)eem (T)o (N)eed (D)ata (P)rocessing.

The OSI provides the following functions:

Interoperability; the method applied to make data understandable to different computers and/or operating systems.

Interconnectivity; the means of transporting information between computers

A guideline or framework of how networks operate.

It breaks down complex operation of networking into simple elements so engineers can specialize design resources on specific elements. This provides for protocols or layers that are less complex and therefore can be defined in greater detail.

UPPER LAYER (APPLICATION) PROTOCOLS (application service oriented)

7. (A)pplication; provides services directly to applications including electronic messaging. Includes file transfer and network management to applications. Devices: HTTP, SNMP, FTP, and WWW.

6. (P)resentation; formats data in order to provide a common interface for applications. Devices: encryption, JPEG, GIF, and MPEG.

5. (S)ession; establishes, manages, and terminates end connections between two nodes. Devices: RPC, SQL, NFS and NetBIOS names.

------------ UPPER LAYER (APPLICATION) PROTOCOLS (data flow oriented)

4. (T)ransport; uses segments; connection-oriented services, flow control, multiplexing, virtual circuit management, and error checking. Reliability (TCP) is achieved through sequenced numbers and ACKs (acknowledgements). Devices: TCP, UDP, and SPX.

3. (N)etwork; uses packets or datagrams; provides functions such as routing packets and logical addressing. Devices: IP, IPX, routers, and routing protocols (OSPF, BGP, IGRP, EIGRP, and RIP).
2. (D)atalink; uses frames; specifies the topology and physical/hardware addressing. Layer 2 devices reduce collisions, which waste bandwidth and prevent packet loss. Devices: bridges, transparent bridges, layer 2 switches, 802.2, 802.3, CDP, Frame Relay, ISL, FDDI, and PPP.

· Includes two sub-layers

LLC (Logical Link Control); logically identifies different protocol types and encapsulates them in order to be transmitted.

MAC (Media Access Control); Physical addressing, network topology, line discipline, and optional flow control.

1. (P)hysical; uses bits; media type, connector type, voltage level, signaling, transmission of the raw bit stream, hardware interface. Also handles synchronization of network timing. Devices: Hubs, EIA/TIA-232, V.35, EIA/TIA-.449, V.24, RJ45, and FDDI.

PROTOCOLS, NETWORKS, MEDIA, AND TOPOLOGIES:

Ports provide and endpoint for communications and allow different applications to run on the same computer. Well-known port numbers are controlled by the IANA (Internet Assigned Numbers Authority). Numbers below 1024 are well known. Numbers above 1024 are dynamically assigned ports.

<Name>;<Port>;<Protocol>

FTP; 21;TCP

Telnet; 23;TCP

SMTP; 25; TCP

DNS; 53;TCP/UDP

TFTP; 69;UDP

SNMP; 161;UDP

RIP; 520;UDP

Thinnet (10 mbps; 185 meters; 10BASE2) is easy to install, and inexpensive. One terminator must be grounded. Uses a 50-ohm terminator on each end, with one terminator grounded.

Thicknet (2.5Mbps to 10MBps; 500 meters; 10BASE5) is thicker, harder to work with, supports very long cable lengths, more expensive, but because of a thicker core, it can carry more signals a longer distance; A terminator at the end of the cable is a resistor that prevents signals that reach the end of the cable from bouncing back and causing interference. Bandwidth potential is much higher than 10Mbps, but LAN technologies do not take advantage of this. Thicknet networks do not talk directly to the medium; they must pass through a transceiver, which has a port for an AUI connector (looks like joystick connector).