Training NA0 - LAN/WAN Administration and TCP/IP Network Design - Basic Concepts in Vienna

RM OSI/ISO Reference Model and TCP/IP Model 

• Encapsulation principle
• The principle of packet transmission over the network
• Troubleshooting
• Analysis of Network communication
• Wireshark

Network devices

• First layer devices of the RM OSI model - repeater and hubs
• Second Layer RM OSI Model Devices - Bridge and Switch
• Third Layer RM OSI model devices - router and firewall
• Fourth Layer of RM OSI Model - Firewall
• Devices operating on higher layers of the RM OSI model - application firewall, load balancer

Types of network topologies

• Bus
• Ring
• Star
• Extended star
• Hierarchical
• Partial-mesh, mesh
• The pros and cons

QoS network parameters

• Bandwidth
• Delay
• Load
• Reliability and MTU

Types of network media

• Copper cabling UTP / STP / ScTP (copper media)
• Optical Cable (FDDI)
• Wireless networks
• Comparison, advantages and suitability of use

4-Layer RM OSI Protocols - UDP and TCP

• Ports, range, division
• Most common static, dynamic, well-known ports
• UDP Usage, Principle of Activity
• TCP - window size, sequence number, acknowledgment number, 3 way handshake

DNS basics

• Hierarchy, record types A, AAAA, NS, MX, TXT
• Primary, secondary and cache DNS server - the principle of operation