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1. Click to edit Master subtitle style Software and Hardware Tools

2. Chapter 18 Objectives • Network+ Exam Objectives : 4.2 Given a scenario, use appropriate hardware tools to troubleshoot connectivity issues. • Cable tester • Cable certifier • Crimper • Butt set • Toner probe • Punch down tool • Protocol analyzer • Loopback plug • TDR • OTDR • Multimeter • Environmental monitor 2

3. Network Scanners • Network scannerhas become a broad term often referring to a family of tools used to analyze our networks • Network scanners refer mainly to these 3 tools: • Packet sniffers • Intrusion Detection System / Intrusion Prevention System (IDS/IPS) software • Port scanners 3

4. 1. Packet Sniffers • Packet sniffers actually look inside every packet on a network segment. • Many flavors, and some of them, like Microsoft’s Network Monitor (NetMon) or Wireshark, are even free • The basic purpose of packet sniffers (or a network analyzer) is to collect and analyze individual packets captured on a specific network segment to determine if problems like bottlenecks, retransmissions, and securitybreaches are present. 4

5. Intrusion Detection and Prevention Software • IDS detects unwantedattempts to manipulate network systems and/or environments • IPS is a computer-security device that monitors network and/or system activities for strange or malicious behavior • Snort is one of the more popular IDS/IPS software products • Cisco offers an Adaptive Security Appliance (ASA) as a hardware enterprise solution A stack of Cisco ASA’s potentially protecting a network: 5

6. IDS/IPS • IDS/IPSimplementations are typically placed in the network where you’re most interested in data compromise evaluation 6

7. Port Scanners • A software tool designed to search a host for open ports. • A portscanis the act of scanning for Transport Control Protocol (TCP) and UDP open ports on a single target host. • Port sweepingmeans scanning multiple hosts on a network for a specific listening TCP or UDP port 7

8. Port Scanners • A program named Network Mapper (Nmap) can be used as a port scanner 8

9. Port Scanners • Angry IP is a providing bothIP-scanning and port-scanning abilities. • Angry IP is not as complex as Nmap and extremely easy to use (a free open source program as well) 9

10. Hardware Tools • Cable Testers • Cable-testing tools can range from simple, inexpensive mechanical devices to elaborate electronic testers that automatically supply you with test results An inexpensive cable tester 10

11. Loopback Plug • A loopback test is a diagnosticprocedure in which a signal is transmitted and returned to the sending device after passing through all or a portion of a network or circuit (Why?) 11

12. Hardware Tools • Wire-Map Testers • A wire-map tester is a device that transmits signals through each wire in a copper twisted-pair cable to determineif it’s connected to the correct pin at the other end. • Continuity Testers • A continuity tester is an even simpler and lessexpensivedevice than a wire-map tester that’s designed to check a copper cable connection for basic installation problems like opens, shorts, and crossed pairs. 12

13. Hardware Tools • Protocol Analyzer • Protocol analyzer is often confused with packet sniffer because some products are both. • A packet snifferlooks at all traffic on a network segment. • A protocol analyzeranalyzes protocols. • Certifiers • Certification testers or certifiersare used to determine whether your network meets specific International Organization for Standardization (ISO) or TIAstandards. 13

14. Hardware Tools • Time-Domain Reflectometer (TDR) • TDR is a tool that finds and describes faults in metallic cables like twisted wire pairs and coaxial cables. • Optical Time-Domain Reflectometer (OTDR) • OTDR is an optoelectronic instrument used to give you information about optical fibers. OTDRs give information about : The fiber’s estimated length Its overall attenuation The location of faults 14

15. Multimeter • A multimeter / multitester (also called a volt/ohm meter [VOM]) is a multitasking electronic measuring instrument. • Used to troubleshoot electrical problems in a wide array of electrical devices like batteries, motor controls, appliances, power supplies, and wiring. 15

16. Toner Probe • A toner probe, also called a tone generator, is a simple copper cable tester that is simple to use and can be used to trace a wire in a wall. 16

17. Hardware Tools • Butt Set • essentially a portable telephone that allows you to test and monitor analog lines. • Punch-Down Tool (KRONE) • Insert wire into punch down blocks • Twisted-pair cable usually terminatedin wiring closets 17

18. Hardware Tools • Wire Crimper / Crimper • A handy tool • Primarily used for attaching ends onto different types of network cables- known as crimping. • Cable Stripper/Snips • Before you can crimp a connector onto the end of a wire, you have to strip the cable with a type of cable stripperand then properly put the wires into the connector. 18

19. Hardware Tools & Environmental Monitors • Voltage Event Recorder • Can troubleshoot and even provide preventative maintenance on your entire electrical system. • Temperature / Humidity Monitor • Designed to monitor the temperate, humidity, and air flow in an area or in a device • Systems can provide multiple sensors feeding data to a single control point. • We can much more accurately track the temperature in our server rooms dynamically in real time. 19