... khoa - Website: www.bkacad.com
Chapter 2 - Communicating
over the Network
CCNA Exploration 4. 0CCNA Exploration 4.0
End Devices and their Role on the Network
ã The network devices that people ... compatible with other networks.
ã The Open System Interconnection (OSI) reference model released in 19 84
was the descriptive network model that the ISO created.
ã It provided vendors with a set of standards ... Model
ã The first layered protocol model for internetwork communications was created
in the early 1970s and is referred to as the Internet model.
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...
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Chapter 1 - Living in
a Network Centric World
CCNA Exploration 4. 0CCNA Exploration 4.0
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Website: www.bkacad.com
Networking Career Opportunities
ã ... experiences, or e-learning.
ã Online courses can contain voice, data, and video, and are available to the
students at any time from any place.
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The ... Instant Messaging
– Weblogs (blogs)
– Wikis
– Podcasting
– Collaboration Tools
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– Collaboration Tools
A Fault Tolerant Network Architecture
ã Packet...
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Speed and Types of Ports/Interfaces
ã The speed : 10/ 100 / 100 0 Mbps. Can increased speeds without replacing
the devices.
ã The number and type of ports:
... ports?
ã The number of UTP ports and fiber ports will be needed. The number of
1 Gbps ports and 10/ 100 Mbps ports.
Types of Connections in a LAN
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... Types of Connections in a LAN
ã There are some connectors associate with V35 serial cable
ã DB 60.
ã Smart Serial
ã Winchester 15 pins
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Calculating...
...
from 100 Mbps per wire pair to 125 Mbps per wire pair, or
500 Mbps for the four pairs. Each wire pair signals in full
duplex, doubling the 500 Mbps to 100 0 Mbps.
ã 100 0BASE-T uses 4D-PAM5 ... Ethernet Physical Layer
ã 100 0BASE-T (IEEE
802 .3ab) was developed to
provide additional
bandwidth.
ã 100 0BASE-T (CAT 5e)
standard is interoperable
with 10BASE-T and
100 BASE-TX (Fast Ethernet ... Gigabit
Ethernet uses two separate encoding steps.
100 0BASE-T Ethernet
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100 0BASE-T Ethernet
ã 100 0BASE-T Ethernet provides full-duplex transmission...
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Chapter 8 - OSI Physical Layer
CCNA Exploration 4. 0CCNA Exploration 4.0
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www.bkacad.com
Characteristics & ... 802 .11b but with the bandwidth of
802 .11a.
ã IEEE 802 .11n - Is currently in draft form. The proposed standard
defines frequency of 2 .4 Ghz or 5 GHz. The typical expected data rates
are 100 ... standards.
ã IEEE 802 .11b - Operates in the 2 .4 GHz frequency band, speed up to
11 Mbps. Longer range and better able to penetrate building structures
than devices based on 802 .11a.
ã IEEE 802 .11g -...
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Follow Data Through an Internetwork
49 Học viện mạng Bách khoa - Website: www.bkacad.com
Framing- Role of the Trailer
34
ã Data Link layer protocols add a trailer to the end ... destination.
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Follow Data Through an Internetwork
44 Học viện mạng Bách khoa - Website: www.bkacad.com
Data Link Layer Protocols- The Frame
38Học ... full-duplex link.
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Placing Data on the Media
14
ã Regulating the placement of data frames onto the media is known as media access
control.
ã...
...
Interface-
type 0/ slot/
port
s0 /0/ 0 &
s0 /0/ 1
fa0 /0/ 0
& 0/ 0/1
Slot 1 HWIC/HWICD/
WIC/VWIC/
VIC
Interface-
type 0/ slot/
port
s0/1 /0 &
s0/1/1
fa0/1 /0
& 0/ 1/1
NME slot ...
Interface-
type
0/ slot/port
S0 /0/ 0 và
s0 /0/ 1
Slot 1 HWIC/WIC/VWIC Interface-
type
0/ slot/port
S0/1 /0 và
s0/1/1
2 801 On board Fast Ethernet Interface-
type 0/ port
Fa0 /0 và fa0/1
Slot 0 VIC /VWIC ... Interface-
type 0/ port
Fa0 /0 và fa0/1
Slot 0 WIC (serial) Interface-
type 0/ port
S0 /0 và S0/1
1 841 On board Fast Ethernet Interface-
type 0/ port
Fa0 /0 và fa0/1
Slot 0 High-speed WAN
Interface...
... known as routing.
4. Decapsulation
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( Refer to 5.1.1 )
Network Layer Fields
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ã 8 bits
ã Specifies ... www.bkacad.com 17
ã 3 bits(R, DF. MF)
R(reserved): set to 0.
DF(Dont fragment):
ã 0: Fragment if necessary.
ã 1: Do not fragment.
MF(More fragment):
ã 0: This is the last fragment.
ã 1: More fragment ... www.bkacad.com 44
Hierarchical Addressing
ã Hierarchical addressing solves the problem of devices
communicating across networks of networks.
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...
... Summary
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Chapter 4 - OSI Transport Layer
CCNA Exploration version 4. 0CCNA Exploration version 4.0
Flow Control
When datagrams arrive too
quickly ... indicator. When
this indicator is received, the
sender can resume the
segment transmission.
Labs
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Managing TCP Sessions
Học viện mạng Bách ... indicator to the
sender to stop sending data.
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sender to stop sending data.
When the receiver can
handle additional data, the
receiver sends...