In contrast to the IPX-based implementation described below, packet
captures seem to reveal that NCP DOES rely on a transport layer when using
IP as a network layer mechanism.
Flags: 0x00
Status: 0x00
Packet Length:66
Timestamp: 19:09:38.677828 03/12/2001
Ethernet Header
Destination: 00:90:7F:0F:0B:D5
Source: 00:10:A4:F5:5A:66
Protocol Type:0x0800 IP
IP Header - Internet Protocol Datagram
Version: 4
Header Length: 5 (20 bytes)
Precedence: 0
Type of Service: %0000
Unused: %0
Total Length: 48
Identifier: 14671
Fragmentation Flags: %010 Do Not Fragment
Fragment Offset: 0 (0 bytes)
Time To Live: 128
IP Type: 0x06 TCP
Header Checksum: 0xF3B3
Source IP Address: 210.225.86.53
Dest. IP Address: xxx.xxx.xxx.x xxx.xx.xxxxxx.xxx
No Internet Datagram Options
TCP - Transport Control Protocol
Source Port: 2583
Destination Port: 524 NCP
Sequence Number: 1273813107
Ack Number: 0
Offset: 7
Reserved: %000000
Code: %000010
Synch Sequence
Window: 16384
Checksum: 0x44D7
Urgent Pointer: 0
TCP Options:
Option Type: 2 Maximum Segment Size
Length: 4
MSS: 1460
Option Type: 1 No Operation
Option Type: 1 No Operation
Option Type: 4
Length: 2
Opt Value:
TCP Data Area: No more data.
Frame Check Sequence: 0x04007C00
"Priscilla Oppenheimer" @groupstudy.com on 11/12/2001
02:55:08 PM
Please respond to "Priscilla Oppenheimer"
Sent by: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
cc: (bcc: Kevin Cullimore)
Subject: RE: What frame format used by TCP/IP? [7:25924]
TCP/IP tells the Ethernet driver what kind of frame type to use and 99.99%
percent of TCP/IP implementations tell the driver to use Ethernet II, which
is the frame format that has Dest Src Type. This is also known as arpa in
the Cisco world.
Is this what you were looking for, though? Or were you looking for a
comparison of IP with IPX and a comparison of SPX with TCP, which I could
write lots about too. ;-)
One main difference between SPX and TCP, by the way, is that SPX is not
used much. It's used by RCONSOLE for remote administration and some SNA
gateways. Some printing services may use it. But most printing, file
sharing, etc. uses NetWare Core Protocol (NCP) which runs directly above
IPX.
TCP, on the other hand, plays a major role in it stack. Many protocols run
above TCP, including FTP, HTTP, Telnet, SMTP, POP, LDAP, BGP, and others.
Priscilla
>-----Original Message-----
>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
>Sent: Monday, November 12, 2001 8:55 AM
>To: [EMAIL PROTECTED]
>Subject: What frame format used by TCP/IP? [7:25924]
>
>
>
>
>Compared with IPX/SPX, what type of frames does TCP/IP use?
>
>Thanks @ Regards to all
>
>_________________________________________________________________
>Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp
>
>[GroupStudy.com removed an attachment of type text/x-vcard which had a
name
>of Thomas Crowe.vcf]
________________________
Priscilla Oppenheimer
http://www.priscilla.com
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