Web: HTTP & HTTPS

1. HTTP uses port no 80.
2. HTTPS uses port no 443. HTTPS is believed to be the safer on...}
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File Transfer: FTP, PuTTY, WinSCP

•  FTP uses two parallel TCP connections to transfer a file, a control connection (port...}
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Electronic Mail: SMTP, POP3, IMAP

The three phases of transfer of SMTP  

1) handshaking (gr...}

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DNS

Name Servers

1. Root Domains
   1. Th...}
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P2P Applications

Peers make a portion of their resources, such as processing power, disk storage or network bandwi...}

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Socket Programming

The following steps occur when establishing a TCP connection between two computers using sockets:...}

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Application Server Concept: Proxy Caching, Web/Mail/DNS Server Optimization

1. Caching:

When a user accesses a...}

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Concept of Traffic Analyzer: MRTG, PRTG, SNMP, Packet Tracer, Wireshark

• MRTG is a tool to monitor the traffic load on network links
• PRTG monitor auto coll...}
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