Computer Communications

Objectives

to apply the different routing algorithms: Link Status (LS) and Distance Vector (DV);
to describe the different unicast routing protocols in use on the Internet;
to distinguish in terms of guarantees and efficiency the different transport services: TCP and UDP;
to configure basic network services: DNS, FTP / TFTP / SFTP and HTTP;
to understand the operation of major Internet applications;
to classify the applications according to their Quality of Service requirements:
to implement applications capable of communicating using TCP or UDP sockets directly;
to identify communication threats and the major security mechanisms available;
to configure security solutions for network and transport layers;

Network Layer: routing concepts, algorithms and protocols; Distance Vector (DV) and Link State (LS) algorithms; Comparation; unicast routing protocols; autonomous systems: internal and external routing;
Transport Layer: transportation services; protocol messages; multiplexing and demultiplexing; UDP protocol; error control, connection control, flow control and congestion control mechanisms; TCP protocol; Application programming using TCP and UDP sockets;
Application Layer: HTTP protocol for web object transfer; sequence diagrams; Persistent and non-persistent HTTP; HTTP2; file transfer (FTP/TFTP/SFTP); Other (SSH, SMTP/MIME, POP/IMAP); Name Resolution Services - Domain Name System (DNS) and Directory Services (LDAP);
Security: main threats to communication; properties of secure communication; security mechanisms; network layer security (IPSec), transport (SSL / TLS), and application;

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