osi network layer 3
Tài liệu Chapter 5 - OSI Network Layer CCNA Exploration version 4.0 ppt
Ngày tải lên :
22/12/2013, 13:17
... Website: www.bkacad.com 39
Network Layer Protocols and Internet Protocol (IP)
Học viện mạng Bách khoa - Website: www.bkacad.com 3
• Define the basic role of the Network Layer in data networks
• The protocols ...
between the Data Link layer and
the Network layer is the
establishment of a maximum size
for the packet.
Network Layer Fields
Học viện mạng Bách khoa - Website: www.bkacad.com 13
• 4 bits
• Indicates ... networks
• The protocols of the OSI model Network layer specify addressing and
processes that enable Transport layer data to be packaged and
transported. The Network layer encapsulation allows its...
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SANS Institute InfoSec Reading Room: Applying the OSI Seven Layer Network Model To Information Security pptx
Ngày tải lên :
05/03/2014, 21:20
... IN Feb 11, 20 13 - Feb 22, 20 13 Live Event
SANS Scottsdale 20 13 Scottsdale, AZUS Feb 17, 20 13 - Feb 23, 20 13 Live Event
SANS Belgium 20 13 Brussels, BE Feb 18, 20 13 - Feb 23, 20 13 Live Event
RSA ... 20 13 - Mar 09, 20 13 Live Event
SANS 20 13 Orlando, FLUS Mar 08, 20 13 - Mar 15, 20 13 Live Event
SANS Secure Canberra 20 13 Canberra, AU Mar 18, 20 13 - Mar 23, 20 13 Live Event
SANS Monterey 20 13 Monterey, ... Monterey, CAUS Mar 22, 20 13 - Mar 27, 20 13 Live Event
SANS Abu Dhabi 20 13 Abu Dhabi, AE Mar 23, 20 13 - Mar 28, 20 13 Live Event
SANS Anaheim 20 13 OnlineCAUS Jan 09, 20 13 - Jan 14, 20 13 Live Event
SANS...
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Network Layer
Ngày tải lên :
12/09/2012, 15:06
... router
2 23. 1.1.1
2 23. 1.1.2
2 23. 1.1 .3
2 23. 1.1.4
2 23. 1.2.9
2 23. 1.2.2
2 23. 1.2.1
2 23. 1 .3. 2
2 23. 1 .3. 1
2 23. 1 .3. 27
network consisting of 3 subnets
subnet
Network Layer 4-5
Two Key Network- Layer Functions
❒
forwarding:
... outgoing link
Network Layer 4-11
Network layer connection and
connection-less service
❒
datagram network provides network- layer
connectionless service
❒
VC network provides network- layer
connection ... to 10.0.0.1, 33 45
Network Layer 4 -33
IP datagram format
ver
length
32 bits
data
(variable length,
typically a TCP
or UDP segment)
16-bit identifier
header
checksum
time to
live
32 bit source...
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The network layer Addressing and routing
Ngày tải lên :
17/09/2012, 09:13
... ipv6 address
2001:0000:0 234 :C1AB:0000:0000:AABC:003F
#
2001:0: 234 :C1AB:0:0:AABC:3F
2001:0:0 234 :C1ab:0:0:aabc:3F
2001::0 234 :C1ab:0:0:aabc:003F
2001:0:0 234 :C1ab::aabc:003F
Or even
# loopback address
0:0:0:0:0:0:0:1
# ... from
194.12. 230 . 130 to 194.12. 230 .140.
1. Propose a mask of sub -network for the network of company.
194.12. 230 .0 is a Class C address, the last byte must be used to encode the numbers of
sub -network ... sub -network.
- 194.12. 230 .0/255.255.255.192 Administrative sub network address range: 194.12. 230 .1
(00 000001) has 194.12. 230 .62 (00 111110)
- Engineers in 194.12. 230 .64/255.255.255.192 network...
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Tìm hiểu mạng VPN và ứng dụng của VPN Layer 3
Ngày tải lên :
26/04/2013, 11:43
... và
23
server. ở đây ta chọn No, use Routing and Remote Access to authenticate
connection requests
Nhấn next để đến cửa sổ kế tiếp.
Nhấn Finish để hoàn tất.
Chương 3: VPN Layer 3
Với L3 VPNs ... chúng ta sẽ nghiên cứu các thành phần sau:
1. Layer 3 Tunneling
Các công nghệ VPN ở lớp 3 được thiết kế để hoạt động ở lớp network của mô
hình OSI. Một cách tiêu biểu, các công nghệ VPN này ... chạy trong lớp 2 hoặc lớp 3, các khối xây dựng mô tả dưới đây có
thể được L2 chỉ, L3 chỉ, hoặc kết hợp cả hai. Chuyển mạch nhãn đa (MPLS) chức năng làm mờ
bản sắc L2-L3.
RFC 4026 tổng quát các...
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Study Guide Cisco Certified Network Associate 3.0 CCNA 3.0 Version 1
Ngày tải lên :
22/10/2013, 17:15
... from a network server to the
Flash memory.
640-607
www.testking.com
-2-
CCNA FOUNDATIONS 4
OSI Model 4
Upper Layer 5
Lower Layers 5
Data Link Layer Tasks 6
Network Layer Tasks ... Transport
Need Network
Data Data Link
Processing Physical
Appliction
(Upper) Layers
Application
Presentation
Session
Transport Layer
Network Layer
Data Link Layer
Presentation Layer
...
Windowing 29
TCP/IP Internet Layer 29
ICMP 30
IP Addressing Basics 30
640-607
www.testking.com
-8-
Transport Layer Tasks
For two devices to communicate within a network a connection or...
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Layer 3 MPLS VPN Enterprise Consumer Guide Version 2
Ngày tải lên :
26/10/2013, 23:15
... VPN Primer
3
Layer 3 MPLS VPN Services Introduction
3
Layer 3 MPLS VPN Terminology
4
Strengths and Limitations of MPLS Layer 3 VPN Services
6
Layer 3 MPLS VPN Operation
6
Layer 3 MPLS VPN ... 409600, localpref 100, weight
32 768, valid, sourced, best
Extended Community: RT:100:1 0x8800 :32 768:0
0x8801:10:1 536 00 0x8802:65281:256000 0x88 03: 65281:1500
38
Layer 3 MPLS VPN Enterprise Consumer ... following
topics:
•
Layer 3 MPLS VPN Route Distribution Operation, page 7
•
Layer 3 MPLS VPN Forwarding Operations, page 8
Layer 3 MPLS VPN Route Distribution Operation
Figure 3 illustrates an...
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Tài liệu Chapter 8 - OSI Physical Layer CCNA Exploration 4.0 pdf
Ngày tải lên :
22/12/2013, 13:17
... Transport layer, placed into
packets by the Network layer, and further encapsulated as
frames by the Data Link layer. The purpose of the Physical
layer is to create the electrical, optical, ... context to give them
meaning to the upper layers of the networking model. This
framing method can be provided by the Data Link layer, the
Physical layer, or by both.
• Signal patterns can indicate: ... as network adapters (NICs),
interfaces and connectors, cable materials, and cable
designs are all specified in standards associated with the
Physical layer.
Characteristics & Uses of Network...
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Tài liệu Chapter 4 - OSI Transport Layer CCNA Exploration version 4.0 docx
Ngày tải lên :
22/12/2013, 13:17
... data
employed by TCP (refer to 4 .3. 3.1)
Học viện mạng Bách khoa - Website: www.bkacad.com 33
Controlling the Conversation
• Segmentation
and Reassembly -
Most networks
have a limitation on
the ... viện mạng Bách khoa - Website: www.bkacad.com 43
TCP Header format: Sequence
Học viện mạng Bách khoa - Website: www.bkacad.com 13
• Sequence Number: 32 bits
– The sequence number of the
first data ... numbers
– FIN: No more data from sender
Transport Layer Role and Services
• Major functions of the transport layer and the role it plays in data
networks
– Tracking the individual communication...
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Tài liệu Quản trị mạng Windows bằng Script - Phần 8: Xử lý lỗi kịch bản điều khiển từ xa bằng Network Monitor 3.0 pptx
Ngày tải lên :
21/01/2014, 03:20
... test125.test.local TCP
TCP: Flags= A , SrcPort=10 63, DstPort=DCE endpoint resolution( 135 ),
Len=0, Seq= 539 1 633 82, Ack=98 133 5462, Win=6 533 9 (scale factor 0) =
6 533 9
61 0.187500 {MSRPC:14, TCP:12, IPv4:5} ...
6 533 9
175 2.0 937 50 {TCP:11, IPv4:8} 172.16.11.124 test125.test.local TCP
TCP: Flags= A , SrcPort=1070, DstPort=DCE endpoint resolution( 135 ),
Len=0, Seq =30 035 14721, Ack=40887016 53, Win=65 535 ... Alter Cont Resp: Call=0x3 Assoc
Grp=0x 333 E Xmit=0x16D0 Recv=0x16D0
43 0.10 937 5 {MSRPC:14, TCP:12, IPv4:5} test124.test.local
test125.test.local DCOM DCOM
44 0.10 937 5 {MSRPC:14, TCP:12, IPv4:5}...
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Tài liệu Cisco: CCNA® 3.0 (Cisco® Certified Network Associate 3.0) Exam 640-607 - Version 6.0 docx
Ngày tải lên :
24/01/2014, 13:20
... routing protocol does not work at transport layer, layer 4. Many routing protocols work at layer
3, the network layer.
Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages ...
Step 2: The transport layer segments the data.
Step 3: The network layer puts the data into packets.
Step 4: The data link layer puts data into frames.
Step 5: The physical layer transmits the ... We need 3 bits for the hosts (2 ^3- 2=6 > 5). This would
provide for 30 subnets (2^5-2 =30 ). A 29bit (24 + 5) network mask translates the 4
th
octet to 248
(=11111000 binary). The network...
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Tài liệu Script - Xử lý lỗi kịch bản điều khiển từ xa bằng Network Monitor 3.0 doc
Ngày tải lên :
25/01/2014, 14:20
... test125.test.local TCP TCP: Flags= A ,
SrcPort=10 63, DstPort=DCE endpoint resolution( 135 ), Len=0, Seq= 539 1 633 82, Ack=98 133 5462,
Win=6 533 9 (scale factor 0) = 6 533 9
61 0.187500 {MSRPC:14, TCP:12, IPv4:5} ...
65 535
8 0.015625 {TCP:6, IPv4:5} test125.test.local test124.test.local TCP TCP: Flags=.S A , SrcPort=DCE
endpoint resolution( 135 ), DstPort=10 63, Len=0, Seq=98 133 5265, Ack= 539 1 632 86, Win=65 535 ... 65 535
9 0.015625 {TCP:6, IPv4:5} test124.test.local test125.test.local TCP TCP: Flags= A , SrcPort=10 63,
DstPort=DCE endpoint resolution( 135 ), Len=0, Seq= 539 1 632 86, Ack=98 133 5266, Win=65 535 ...
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Chapter 19 Network Layer: Logical Addressing potx
Ngày tải lên :
06/03/2014, 12:20
... B) and add dots for
separation.
19.48
Figure 19. 13 An ISP and NAT
19 .31
Figure 19.4 A network configuration for the block 205.16 .37 .32 /28
19 .30
c. The number of addresses can be found by
complementing ... 19.19
Figure 19 .3 A block of 16 addresses granted to a small organization
19.5
The address space of IPv4 is
2
32
or 4,294,967,296.
Note
19.16
Table 19.2 Default masks for classful addressing
19 .3
An IPv4 ... discussed in this section:
19.7
Numbering systems are reviewed in
Appendix B.
Note
19.1
Chapter 19
Network Layer:
Logical Addressing
Copyright © The McGraw-Hill Companies, Inc. Permission required for...
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Chapter 20 Network Layer: Internet Protocol pot
Ngày tải lên :
06/03/2014, 12:20
... section:
20.5
Figure 20 .3 Network layer at the source, router, and destination
20.25
Figure 20.9 Maximum transfer unit (MTU)
20.44
Table 20.9 Comparison between IPv4 and IPv6 packet headers
20 .35
Figure 20. 13 shows ... transition strategies
20.6
Figure 20 .3 Network layer at the source, router, and destination (continued)
20.19
Figure 20.8 Protocol field and encapsulated data
20 .37
Figure 20.14 Taxonomy of options ... is 8 × 4, or 32
bytes. The first 20 bytes are the base header, the
next 12 bytes are the options.
Example 20.2
20.41
Table 20.6 Next header codes for IPv6
20.1
Chapter 20
Network Layer:
Internet...
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Chapter 21 Network Layer: Address Mapping, Error Reporting, and Multicasting pdf
Ngày tải lên :
06/03/2014, 12:20
... 228.42.0.0.
21 .35
Figure 21.18 IGMP operation
21.18
Figure 21.10 Contents of data field for the error messages
21.21
Figure 21. 13 Encapsulation of ICMP query messages
21 .31
21 -3 IGMP
21 -3 IGMP
The ... Time 50: The timer for 238 .71.0.0 in host B expires,
and a membership report is sent, which is received by
the router and every host.
d. Time 70: The timer for 230 . 43. 0.0 in host C expires,
... discussed in this section:
Topics discussed in this section:
21 .30
Example 21.5 (continued)
21 .39
Example 21.6 (continued)
b. Time 30 : The timer for 225.14.0.0 in host A expires, and
a membership...
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