Chương 4
tng Network
Computer
Networking: A Top
Down Approach
6th edition
Jim Kurose, Keith Ross
Addison-Wesley
March 2012
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All material copyright 1996-2012
J.F Kurose and K.W. Ross, All Rights Reserved
Tầng Network 4-1
Tầng Network 4-2
Chương 4: tng network
M
c tiêu:
Hiu các nguyên lý nn tng ca các dnh v
tng network:
Các mô hình dch vtng network
forwarding so vi routing
Cách mà router hot đng
routing (chn đường)
broadcast, multicast
Hin thc trong Internet
Tầng Network 4-3
4.1 Gii thiu
4.2 virtual circuit
network (Mng mch
o) và datagram
network
4.3 Cu trúc bên trong
router
4.4 IP: Internet Protocol
Đnh dng datagram
IPv4 addressing
ICMP
IPv6
4.5 các thut toán routing
link state
distance vector
hierarchical routing
4.6 routing trong Internet
RIP
OSPF
BGP
4.7 broadcast và multicast
routing
Chương 4: Ni dung
Tầng Network 4-4
Tng Network
Segment ca tng
transport thost gi đến
host nhn
Bên phía gi sđóng gói
(encapsulate) các segment
vào trong các datagram
Bên phía nhn, chuyn các
segment lên tng transport
Các giao thc tng network
trong
m
i
host, mi router
router sxem xét các
trường ca header trong
tt ccác IP datagram đi
qua nó
application
transport
network
data link
physical
application
transport
network
data link
physical
network
data link
physical network
data link
physical
network
data link
physical
network
data link
physical
network
data link
physical
network
data link
physical
network
data link
physical
network
data link
physical
network
data link
physical
network
data link
physical
network
data link
physical
Tầng Network 4-5
2 chc năng chính ca tng network
forwarding:
di chuyn
các packet tđu vào
đến đu ra thích hp
ca router
routing:
xác đnh
đường đi cho các gói
tngun đến đích.
Các thu
t toán đ
nh
tuy
ế
n
T
ươ
ng t
:
routing:
tiến trình lp
kếhoch cho chuyến
đi ca packet t
ngun ti đích
forwarding:
tiến trình
vn chuyn qua 1 giao
đim