... Website: www.bkacad.com
Chapter 3 - Application Layer
Functionalityand Protocols
CCNA Exploration4. 0CCNA Exploration4. 0
DNS - Example
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FTP
ã The ... packet
22
DHCP client broadcasts a DHCPREQUEST packet
33
DHCP Server1 broadcasts a DHCPACK packet
44
DHCP
Client
DHCP
Server1
Overview
ã Describe how the functions of the three upper OSI model ...
resolution.
ã Computer operating systems also have a utility called nslookup that
allows the user to manually query the name servers to resolve a given
host name. This utility can also be used to...
... Bách khoa - Website: www.bkacad.com
Chapter 2 - Communicating
over the Network
CCNA Exploration4. 0CCNA Exploration4. 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 ... mng Bỏch khoa - Website: www.bkacad.com
Getting the Data through the Internetwork
ã Explain how labels in encapsulation headers are used to
manage communication in data networks
Học viện mạng...
... khoa - Website: www.bkacad.com
Chapter 1 - Living in
a Network Centric World
CCNA Exploration4. 0CCNA Exploration4. 0
Học viện mạng Bách khoa -
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
Học viện mạng Bách khoa - Website: www.bkacad.com
– Collaboration Tools
A Fault Tolerant Network Architecture
ã Packet...
... lightweight, flexible, small diameter, which allows it to fit
into small spaces. The connectors, RJ -45 plugs: easy to install.
ã Fiber-optic cables: contain a thin glass fiber. Crimps or sharp bends...
... pairs. Each wire pair signals in full
duplex, doubling the 500 Mbps to 1000 Mbps.
ã 1000BASE-T uses 4D-PAM5 line encoding to obtain 1
Gbps data throughput.
Layer 2 addressing and its Impact on ... Network Operation
and Performance
Network Layer
ã Network layer (Layer 3) addresses, such as IPv4
addresses, provide the ubiquitous, logical addressing that
is understood at both source and...
... viện mạng Bách khoa - Website: www.bkacad.com
Chapter 8 - OSI Physical Layer
CCNA Exploration4. 0CCNA Exploration4. 0
Học viện mạng Bách khoa - Website:
www.bkacad.com
Characteristics & ... Operates in the 2 .4 GHz frequency band, speed up to
54 Mbps. Devices implementing this standard therefore operate at the
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54 Mbps. Devices implementing ... speed up to 54
Mbps, small coverage area; less effective at penetrating building
structures. Not interoperable with the 802.11b and 802.11g standards.
ã IEEE 802.11b - Operates in the 2 .4 GHz frequency...
... Website: www.bkacad.com
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...
... Semester 4 Skills Based Final – Part 1 Router Configuration
Student Training – Frame Relay Scenario – (60 pts)
HeadQuarters
MainOffice
Serial
202.168.10.0/ 24
172.50.1.0/ 24
HQ Network
S0/.1
(DCE)
S0/.2
E0
S1
Frame ... 255.255.255. 248
Subnet Address of This
Subnet or Wire
Range of Host Addresses
For this subnet
Broadcast Address of This
Subnet
CCNA Semester 4 - Skills Based Final Exam - Student ... traffic is permitted.
4 pt/
Points Scored : (items above are correct or not, no partial points) ______________
Semester 4 Skills Based Final – Part 2 Subnet Exercise
Student Training (20 pts)...
... Summary
Học viện mạng Bách khoa - Website: www.bkacad.com 45
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
44 Học viện mạng Bách khoa - Website: www.bkacad.com
Managing TCP Sessions
Học viện mạng Bách ... indicator to the
sender to stop sending data.
Học viện mạng Bách khoa - Website: www.bkacad.com 40
sender to stop sending data.
When the receiver can
handle additional data, the
receiver sends...
...
Port Number
17
Port Number
Well Known or Registered
Port Number
Registered Ports (Numbers 10 24 to 49 151)
Assigned to user processes or
applications.
Non-common applications.
Client: TCP destination ... User Datagram Protocol
Client
SEQ=1,001 – 2,000
Web
Server
SEQ=2,001 – 3,000
SEQ=3,001 – 4, 000
SEQ =4, 001 – 5,000
ACK=2,001
Window=7,000
SEQ=1 – 1,000
SEQ=6,001
–
7,000
SEQ=5,001 – 6,000
Web ... received before retransmission timer expires
Receive buffers are increasing, less bits to process.
44
Step 1: Client sends ISN, SEQ=8563 (last four digits)
Transport Layer
www.cisco.com
TCP Segment
7
...
... because I like it; it’s a beautiful
language
3. because I work with the foreigners in
my company
4. to graduate
5. to understand how English people
think and feel
HINTS FOR TEACHERS
o
Real ... Please to meet you, Mr. and
Mrs. Tavares.
Mr.& Mrs.Tavares: Nice to meet you, Tom.
For what student level would you teach
this conversation?
TASK - INTRODUCING
“Good evening. I’m Philip ... Laura Gordon
and Brian Mani. Laura and Brian are
independent management consultants…”
For what student level would you teach
this conversation?
HINTS FOR TEACHERS
Enhance Ss’ autonomy by…
o
...