Protocol Giao thức là những quy ước chung cac host phai tuan theo khi tham gia quá trình truyền thông Các giao thức không hoạt động riêng lẻ mà thường kết hợp với nhau thành chồng gia
Trang 2Protocol
Giao thức là những quy ước chung cac host phai tuan theo khi tham gia quá trình
truyền thông
Các giao thức không hoạt động riêng lẻ mà thường kết hợp với nhau thành chồng
giao thức “Protocol Stack” TCP/IP: IP, TCP, UDP, AEP, ICMP, DHCP
TP ProtocoL LTIZ¿ H>rrtieœroil
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OSI - Open Systems Interconnection
Application
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Trang 57 Application " Reduces complexity
Le] Presentation " Standardizes interfaces
" Facilitates modular engineering
technology L4] Transport " Accelerates evolution
L3] Network = Simplifies teaching and learning
" Facilitate troubleshoot
2] Data Link
a Physical
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Hop-by-hop vs Host-to-host
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© 2007 Cisco Systems, Inc All rights reserved
Network Process to Applications Data Representation
Interhost Communication End-to-End Connections Data Delivery
Access to Media Binary Transmission
= Defines the electrical, mechanical,
procedural, and functional
specifications for activating, maintaining, and deactivating the physical link
ICND1 v1.0—1-10
Trang 11Application Network Process to Applications
Presentation Data Representation
Transport End-to-End Connections
Network Data Delivery
Access to Media
=» Defines how data is formatted for transmission and how access to the network is controlled
= Provides error detection
Trang 13Application Network Process to Applications
Presentation Data Representation
Session Interhost Communication
= Routes data packets
= Selects best path to deliver data
« Provides logical addressing and
Trang 16= Handles transportation issues between hosts
=» Ensures data transport reliability
= Establishes, maintains, and terminates virtual circuits
= Provides reliability through fault
detection and recovery information flow control
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Trang 19OSI Model
session session session session session
Lis | “4 Google “4 Google “4 Google ea Search Search é
Trang 20Sessio = Negotiates data transfer syntax
for application layer
Transport = Provides encryption
Network Data Link
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OSI Model
Network Processes to Applications
=» Provides network services to
application processes (such as
electronic mail, file transfer,
and terminal emulation)
= Provides user authentication
Cao thức lớp Application la FTP, TFTP, SMTP, POP3, Telnet, SSH,
HTTP, HTTPS
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Physical BE
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=a Application |
= Presentation |
|
= Session |
|
|
EM Physical k
Application _m
Data >| Presentation Km Data
Trang 26TCP/IP Stack
301P_964
© 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—1-29