Paul Barry, a blues harmonica player, promoter, and bandleader, was born and raised in St. Paul, Minnesota. Paul has fronted many bands over the years, playing and recording with Big Smokey Smothers, Willie Walker, and Mitch Kashmar among others. In 2016 Paul released a 1992 recording where he backed the legendary former Muddy Waters and Howlin' Wolf sideman Big Smokey Smothers. That's Alright received critical acclaim and was Smothers' final studio recording. Paul also released two albums under his own name: Talk Is Cheap in 2016 and Blow It Cool in 2018. The Paul Barry Blues Band, based in Minneapolis/St. Paul, specializes in Chicago and West Coast jump blues and plays locally in clubs and festivals in and around the state of Minnesota. Paul also is active in promoting blues in the Twin Cities area dating back to the late 1970s. He currently hosts an annual New Year's Eve blues celebration with nationally known blues artists. In his spare time, Paul is an avid tennis player and an awarding-winning high school tennis coach.

1. Meet Perl
Perl's Default Behaviour
Using Variables in Perl
Controlling Flow
Boolean in Perl
Perl Operators
Subroutines
Perl I/O
Packages, Modules and Objects
More Perl
Where to From Here?
Print Resources
Web Resources
2. Snooping
Thank You, Tim Potter
Preparing to Snoop
Building Low-Level Snooping Tools
Snooping IP Datagrams
Transport Snoopers
The Network Debugger
Where to From Here?
Print Resources
Web Resources
3. Sockets
Clients and Servers
Transport Services
Introducing the Perl Socket API
Socket Support Subroutines
Simple UDP Clients and Servers
Genericity and Robustness
UDP is Unreliable
Sending and Receiving with UDP
Dealing with Deadlock
TCP Clients and Servers
A Common TCP Gotcha
More TCP Socket Communication
The Concurrent Syntax Checker
Object-Oriented Sockets
Where to From Here?
Print Resources
Web Resources
4. Protocols
Gotcha!
Working with the Web
The World's Worst Web Browser
HTTP Status Codes
It's the Gisle and Graham Show!
The Library for WWW Access in Perl
The LWPwwwb Program
Doing More with LWPwwwb
Building a Custom Web Server
The libnet Library
Email Enabling simplehttpd
Other Networking Add-on Modules
Where to From Here?
Print Resources
Web Resources
5. Management
Simple Management with ICMP
Doing the Ping Thing
Doing the Net: Ping Thing
Tracing Routes
Not So Simple Management with SNMP
The SNMP Management Framework
Managed Data
The SNMP Protocol
The Net: SNMP Module
Working with Net: SNMP
What's Up?
Setting MIB-II Data
IP Router Mapping
Where to From Here?
Print Resources
Web Resources
6. Mobile Agents
What is a Mobile Agent?
Mobile-Agent Examples
Mobile-Agent Advantages/Disavantages
Perl Agents
The Agent.pm Module
Ooooh, Objects!
The Default Mobile Agent
A Launching Mobile-Agent Environment
A One-Shot Location
Relocating to Multiple Locations
The Mobile-Agent multiwho
The Mobile-Agent ipdetermine
The Cloning Mobile-Agent ipdetermine
Other Perl Agent Examples
Where to From Here?
Print Resources
Web Resources
Appendices
Index