WCNA training course description

Wireshark is a free network protocol analyser. This hands-on course provides a comprehensive tour of using Wireshark to troubleshoot networks. The course concentrates on the information needed in order to pass the WCNA exam. Students will gain the most from this course only if they already have a sound knowledge of the TCP/IP protocols.

What will you learn

• Analyse packets and protocols in detail.
• Troubleshoot networks using Wireshark.
• Find performance problems using Wireshark.
• Perform network forensics.

WCNA training course details

WCNA training course contents

• What is Wireshark?

Network analysis, troubleshooting, network traffic flows.
Hands on Download/install Wireshark.

• Wireshark introduction

Capturing packets, libpcap, winpcap, airpcap. Dissectors and plugins. The menus. Right click.
Hands on Using Wireshark.

• Capturing traffic

Wireshark and switches and routers. Remote traffic capture.
Hands on Capturing packets.

• Capture filters

Applying, identifiers, qualifiers, protocols, addresses, byte values. File sets, ring buffers.
Hands on Capture filters.

• Preferences

Configuration folders. Global and personal configurations. Capture preferences, name resolution, protocol settings. Colouring traffic. Profiles.
Hands on Customising Wireshark.

• Time

Packet time, timestamps, packet arrival times, delays, traffic rates, packets sizes, overall bytes.
Hands on Measuring high latency.

• Trace file statistics

Protocols and applications, conversations, packet lengths, destinations, protocol usages, strams, flows.
Hands on Wireshark statistics.

• Display filters

Applying, clearing, expressions, right click, conversations, endpoints, protocols, combining filters, specific bytes, regex filters.
Hands on Display traffic.

• Streams

Traffic reassembly, UDP and TCP conversations, SSL.
Hands on Recreating streams.

• Saving

Filtered, marked and ranges.
Hands on Export.

• TCP/IP Analysis

The expert system. DNS, ARP, IPv4, IPv6, ICMP, UDP, TCP.
Hands on Analysing traffic.

• IO rates and trends

Basic graphs, Advanced IO graphs. Round Trip Time, throughput rates.
Hands on Graphs.

• Application analysis

DHCP, HTTP, FTP, SMTP.
Hands on Analysing application traffic.

• WiFi

Signal strength and interference, monitor mode and promiscuous mode. Data, management and control frames.
Hands on WLAN traffic.

• VoIP

Call flows, Jitter, packet loss. RTP, SIP.
Hands on Playing back calls.

• Performance problems

Baselining. High latency, arrival times, delta times.
Hands on Identifying poor performance.

• Network forensics

Host vs network forensics, unusual traffic patterns, detecting scans and sweeps, suspect traffic.
Hands on Signatures.

• Command line tools

Tshark, capinfos, editcap, mergecap, text2pcap, dumpcap.
Hands on Command tools.

Learning path

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