Build A Small Network

Devices in a Small Network

Small business networks using simple designs with router, switch, and end devices

Small Network Topology

Basic network layout used in small organizations with minimal infrastructure

Device Selection Factors

Cost, speed, expandability, and OS features used to choose network devices

IP Addressing Scheme

Structured plan assigning unique IP addresses to all devices in a network

Redundancy

Network design approach that removes single points of failure using backups

Traffic Management (QoS)

Technique that prioritizes important traffic like voice and video

Network Applications

Applications that directly use network protocols to communicate

Application Layer Services

Services that support applications not directly network-aware

Common Protocols in Small Network

HTTP, HTTPS, FTP, SFTP, SMTP, POP3, IMAP, DNS, DHCP, SSH, Telnet

VoIP

Voice communication over IP networks

IP Telephony

Voice system using dedicated call control servers

RTP/RTCP

Protocols used for real-time voice and video transmission

Small Network Scaling

Process of expanding a network as requirements increase

Network Documentation

Records of network layout, devices, and configuration details

Traffic Analysis

Examination of network traffic patterns for optimization

Network Utilization Snapshot

Recorded system and network usage data at a point in time

Ping Command

Tool used to test connectivity using ICMP messages

Traceroute/Tracert

Tool used to identify network path and hops to destination

Extended Ping

Cisco IOS feature for advanced ping testing options

Extended Traceroute

Cisco IOS feature for detailed path testing

Network Baseline

Reference performance data used for comparison and troubleshooting

IP Config (Windows)

Command used to view IP address, gateway, and DNS settings

Linux IP Commands

Commands used to view and manage network interface configuration

macOS Network Commands

Commands used to view network configuration on Mac systems

ARP Command

Displays IP-to-MAC address mappings in cache

Show Running-config

Displays current configuration of Cisco device

Show IP Interface Brief

Displays summary of interface status and IP addresses

Show IP Route

Displays routing table information

CDP Neighbors

Displays directly connected Cisco devices

Troubleshooting Methodology

Structured process for identifying and resolving network issues

Debug Command

IOS command used for real-time diagnostic output

Terminal Monitor

Enables display of debug output on remote terminal sessions

Duplex Mismatch

Condition where connected devices use different duplex modes causing errors

DHCP Issue

Failure of device to obtain valid IP address automatically

APIPA

Automatic private IP assignment when DHCP fails

Default Gateway Issue

Incorrect gateway preventing external network communication

DNS Issue

Failure in resolving domain names to IP addresses

Small Network Growth

Expansion process of a network with increased requirements

Cloud Services Impact

Use of cloud systems reducing need for local infrastructure