第二章课后题答案

电玩女神 2022-06-09 10:09 244阅读 0赞

1.  参见 [https://www.iana.org/assignments/version-numbers/version-numbers.xhtml\#version-numbers-1][https_www.iana.org_assignments_version-numbers_version-numbers.xhtml_version-numbers-1]
2.  参见[https://tools.ietf.org/html/rfc1819][https_tools.ietf.org_html_rfc1819]
3.  ip minimum packet size is 576B, minus fixed ip header(20B) and tcp header(20B), then max mss is 536B, 参见[https://tools.ietf.org/html/rfc6691][https_tools.ietf.org_html_rfc6691]
4.  如下:  
    
    
    1.  client: SYN i
    2.  server: SYN j, ACK i+1
    3.  client: ACK j+1
    4.  server: response data(26B)
    5.  client: ACK i+2, FIN m (client socket status: FIN\_WAIT\_1)
    6.  server: ACK m+1, FIN n (client socket status: FIN\_WAIT\_2, server socket status: CLOSE\_WAIT)
    7.  client: ACK n+1 (client socket status: TIME\_WAIT, server socket status: CLOSED)
5.  no mss options specified, then user max mss 536B
6.  89, 参见[https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml\#protocol-numbers-1][https_www.iana.org_assignments_protocol-numbers_protocol-numbers.xhtml_protocol-numbers-1], also [https://tools.ietf.org/html/rfc2328\#page-42][https_tools.ietf.org_html_rfc2328_page-42]
7.  no yet knows

[https_www.iana.org_assignments_version-numbers_version-numbers.xhtml_version-numbers-1]: https://www.iana.org/assignments/version-numbers/version-numbers.xhtml#version-numbers-1
[https_tools.ietf.org_html_rfc1819]: https://tools.ietf.org/html/rfc1819
[https_tools.ietf.org_html_rfc6691]: https://tools.ietf.org/html/rfc6691
[https_www.iana.org_assignments_protocol-numbers_protocol-numbers.xhtml_protocol-numbers-1]: https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml#protocol-numbers-1
[https_tools.ietf.org_html_rfc2328_page-42]: https://tools.ietf.org/html/rfc2328#page-42