CDP is a Cisco proprietary protocol that is enabled by default on all Cisco routers. It allows routers to learn information about neighboring devices on the network layer, such as hardware and protocol details. CDP commands like "show cdp neighbor" and "show cdp neighbor detail" can be used to troubleshoot connectivity issues between routers and find client connectivity paths through the display of neighboring device information.
Spoofing es una técnica de suplantación de identidad a través de vulnerabilidades en redes como páginas web, IP, DNS y correo electrónico. Las botnets son redes de computadoras infectadas que son controladas remotamente para realizar ataques como denegación de servicio. Es importante actualizar software, evitar descargas ilegales y usar antivirus para prevenir estos ataques.
The document discusses application layer architectures and protocols. It describes host-based, client-based, and client-server architectures and how functions are distributed in each. Popular applications like the World Wide Web and email are then explained, including how protocols like HTTP and SMTP enable them. Key application layer standards and their roles are defined.
The document discusses several topics related to computer networks including DHCP, DNS, Telnet, SSH, FTP, HTTP, and electronic mail protocols. It describes how DHCP automatically assigns IP addresses to devices on a network. It also explains the domain name system (DNS), which maps human-friendly domain names to IP addresses and vice versa, allowing computers to connect to other computers using names instead of numeric IP addresses. Additional sections cover protocols for remote login (Telnet, SSH), file transfer (FTP), web protocols (HTTP, URLs, cookies), and electronic mail (SMTP, POP, IMAP, MIME).
Chapter 10: Objectives
--------------------------------------------------
By the end of this chapter, you will be able to:
Explain how the functions of the application layer, session layer, and presentation layer work together to provide network services to end user applications.
Describe how common application layer protocols interact with end user applications.
Describe, at a high level, common application layer protocols that provide Internet services to end-users, including WWW services and email.
Describe application layer protocols that provide IP addressing services, including DNS and DHCP.
Describe the features and operation of well-known application layer protocols that allow for file sharing services, including: FTP, File Sharing Services, SMB protocol.
Explain how data is moved across the network, from opening an application to receiving data.
Yaser Rahmati | یاسر رحمتی
Rahmati Academy | آکادمی رحمتی
www.yaser-rahmati.ir
www.rahmati-academy.ir
The document discusses various applications in the application layer of the Internet protocol stack, including the Domain Name System (DNS), electronic mail, the World Wide Web, streaming audio and video, and content delivery. It provides details on DNS, describing how domain names are organized hierarchically and mapped to IP addresses, and how name servers function to look up domain names. It also gives overviews of electronic mail/email, noting its widespread use both personally and for business, and the problem of spam.
CDP is a Cisco proprietary protocol that is enabled by default on all Cisco routers. It allows routers to learn information about neighboring devices on the network layer, such as hardware and protocol details. CDP commands like "show cdp neighbor" and "show cdp neighbor detail" can be used to troubleshoot connectivity issues between routers and find client connectivity paths through the display of neighboring device information.
Spoofing es una técnica de suplantación de identidad a través de vulnerabilidades en redes como páginas web, IP, DNS y correo electrónico. Las botnets son redes de computadoras infectadas que son controladas remotamente para realizar ataques como denegación de servicio. Es importante actualizar software, evitar descargas ilegales y usar antivirus para prevenir estos ataques.
The document discusses application layer architectures and protocols. It describes host-based, client-based, and client-server architectures and how functions are distributed in each. Popular applications like the World Wide Web and email are then explained, including how protocols like HTTP and SMTP enable them. Key application layer standards and their roles are defined.
The document discusses several topics related to computer networks including DHCP, DNS, Telnet, SSH, FTP, HTTP, and electronic mail protocols. It describes how DHCP automatically assigns IP addresses to devices on a network. It also explains the domain name system (DNS), which maps human-friendly domain names to IP addresses and vice versa, allowing computers to connect to other computers using names instead of numeric IP addresses. Additional sections cover protocols for remote login (Telnet, SSH), file transfer (FTP), web protocols (HTTP, URLs, cookies), and electronic mail (SMTP, POP, IMAP, MIME).
Chapter 10: Objectives
--------------------------------------------------
By the end of this chapter, you will be able to:
Explain how the functions of the application layer, session layer, and presentation layer work together to provide network services to end user applications.
Describe how common application layer protocols interact with end user applications.
Describe, at a high level, common application layer protocols that provide Internet services to end-users, including WWW services and email.
Describe application layer protocols that provide IP addressing services, including DNS and DHCP.
Describe the features and operation of well-known application layer protocols that allow for file sharing services, including: FTP, File Sharing Services, SMB protocol.
Explain how data is moved across the network, from opening an application to receiving data.
Yaser Rahmati | یاسر رحمتی
Rahmati Academy | آکادمی رحمتی
www.yaser-rahmati.ir
www.rahmati-academy.ir
The document discusses various applications in the application layer of the Internet protocol stack, including the Domain Name System (DNS), electronic mail, the World Wide Web, streaming audio and video, and content delivery. It provides details on DNS, describing how domain names are organized hierarchically and mapped to IP addresses, and how name servers function to look up domain names. It also gives overviews of electronic mail/email, noting its widespread use both personally and for business, and the problem of spam.