IT training 5 operating systems technologies comptia a plus 220 902 m5 slides

Network Services

Tim Warner
@TechTrainerTim



The Pluralsight Learning Path for CompTIA A+
(220-902)
Introduction
Windows OS
Other Operating Systems
Security
Software Troubleshooting
Operational Procedures


Other Operating Systems & Technologies
for CompTIA
A+ (220-902) Table of Contents
OS X Features and Functionality
Basic Linux Commands
Client-Side Virtualization
Basic Cloud Concepts
Network Services
Mobile OS Features
Mobile Device Connectivity
Mobile Device Synchronization


Overview

Server roles
Internet appliances
Legacy/embedded systems


Meanwhile, in the Real World…
Is my game
console
vulnerable?

customer

technician


CompTIA A+ 220-902

Summarize the properties and purpose
2.4
of services provided by network hosts


Server Roles


Server Roles vs. Server Features
Role


Software that allows a server to

perform a specific function for
multiple users and computers



AD domain controller



DHCP



DNS

Feature


Software that improves the
functionality of the server



Failover clustering



Telnet client

Web Server


HTTP(s) services



N-tier
applications



Web services


Network Infrastructure Servers


DHCP - IP configuration
-



Relay agent

DNS - Host name resolution
-

SRV records



Authentication server



File and print server
-

Single-sign on (SSO)



Mail Server


SMTP - Simple Mail Transfer
Protocol
-

POP, IMAP



Be careful with Internet
connectivity and relay



Market leaders:
-

Microsoft Exchange Server
Postfix (FOSS)
Exim


Demo 1: Web Server
Show IIS config (permissions)
Edit the home page
Show DNS record
Show Internet printing


Internet Appliances


Network Appliance
A relatively low-cost computer designed
chiefly to provide Internet access without the
full capabilities of a standard computer


UTM/Proxy


IDS vs IPS
IDS

IPS



Firewalls block incoming
connections, but IDS acts on internal
and external traffic



IDS that actually enacts workflow
when an alarm is raised (eg
connection termination)



When a known event occurs, device
raises an alarm (passive monitoring)



Stateful (layer 7) inspection: Can see
commands on the wire



Methods: Anomaly (baseline),
signature



Vendors: Cisco, Check Point, Juniper


Legacy/Embedded
Systems


Legacy System
Of, relating to, or being a previous or outdated
computer system. Often a pejorative term,
referencing a system as "legacy" often implies
that the system is out of date or in need of
replacement


Embedded System
A computer system with a dedicated function
within a larger mechanical or electrical system,
often with real-time computing constraints


Embedded Systems


"A computer within a
computer"



Has its own OS





Microcontroller - CPU with
integrated RAM and
peripherals
SCADA, traffic lights,
personal electronics


Demo:

sdf


Back in the Real World…
Is my game
console
sdf
vulnerable?

customer

technician


Back in the Real World…

Yes. Keep it
patched and
watch the camera

customer

technician