206β - Πρωτόκολλα Επικοινωνιών Άσκηση 1.pdf

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Τ.Ε.Ι. Κεντρικής Μακεδονίας Τμήμα: Μηχανικών Πληροφορικής Τ.Ε. M. Sc.: Συστήματα Τηλεπικοινωνιών & Πληροφορικής 206β - Πρωτόκολλα Επικοινωνιών Εργαστηριακή Άσκηση 1 – Wireshark Lab: Getting Started Όνομα: Καρατζόγλου Αναστάσιος Α.Μ: 38 3/30/2015

Transcript of 206β - Πρωτόκολλα Επικοινωνιών Άσκηση 1.pdf

  • ...

    : ..

    M. Sc.: &

    206 -

    1 Wireshark Lab: Getting Started : .: 38 3/30/2015

  • 1 :

    1. 10 Protocol

    packet-listing Wireshark.

    :

    internet capture

    Wireshark /

    .

    Protocol.

    :

    ARP - Address Resolution Protocol ( )

    RFC 826

    (link layer) (hardware address)

    (network layer).

    IPv4 Ethernet ( RFC 826

    Ethernet (Ethernet Address Resolution Protocol)), ARP

    IP ATM FDDI.

    DNS - Domain Name System ( )

    ,

    IP. DNS

    (server) .

    ,

    , HTTP, FTP, POP, IMAP

    SMTP, (HTTP),

    (FTP), email (POP IMAP).

    HTTP - Hyper Text Transfer Protocol, .

    (server)

    (client).

    IPv6 - Internet Protocol version 6

    Internet (IP),

    . IPv4,

    . IPv6 Internet

  • Engineering Task Force, IETF,

    IPv4.

    TLS - Transport Layer Security

    - (server -client)

    "" .

    TLS Secure Sockets Layer (SSL).

    . TLS

    : TLS Record Protocol TLS Handshake Protocol.

    TCP - Transmission Control Protocol ,

    .

    .

    UDP - User Datagram Protocol,

    .

    , . UDP

    /

    .

    FTP - File Transfer Protocol, ,

    TCP/IP.

    / ,

    - .

    ICMP - Internet Control Message Protocol.

    /

    , .. server.

    To SSDP - Simple Service Discovery Protocol, HTTP.

    ,

    .

    capture

    Wireshark.

  • 2. HTTP GET

    HTTP ; ( ,

    packetlisting , .

    Time , menu Wireshark

    View -> Time Display Format, , Time-of-day.

    :

    http://gaia.cs.umass.edu/wireshark-labs/INTRO-

    wireshark-file1.html. Wireshark:

    HTTP GET

    HTTP OK :

    HTTP OK-HTTP GET=Delay

    58.814988000 58.670515000 = 0.144473000

  • :

    Time Reference

    Set Time Reference

    Time.

  • 3. gaia.cs.umass.edu (

    www.net.cs.umass.edu); IP ;

    :

    IP (IP address-Internet

    Protocol Address),

    Internet Protocol standard. . IP

    .

    IP gaia.cs.umass.edu :

    128.119.245.12

  • IP Home-Desktop :

    192.168.1.3

    4. persistent non-persistent , ;

    :

    Persistent

    Hyper Transfer Protocol Wireshark Connection: keep-alive\r\n

    HTTP/1.1 Persistent.

  • :

    HTTP/1.0 (Connection) Non-Persistent ,

    " Connection: keep-alive" http

    Request. ,

    Persistent .

    HTTP/1.1 (Connection) Persistent ,

    "Connection: close" HTTP Request.

    .