CompTIA Network+ All-in-One Exam Guide in Software

Creator GS1 - 12 in Software CompTIA Network+ All-in-One Exam Guide

Layer 5 Session Layer 6 Presentation Layer 7 Application Wiring schematics Physical and logical network diagrams Baselines Policies, procedures and configurations Regulations Compare wiring schematics, physical and logical network diagrams, baselines, policies and procedures and configurations to network devices and infrastructure Update wiring schematics, physical and logical network diagrams, configurations, and job logs as needed Network monitoring utilities (eg packet sniffers, connectivity software, load testing, throughput testers) System logs, history logs, event logs Methods: QoS Traffic shaping Load balancing High availability Caching engines Fault tolerance Reasons: Latency sensitivity High bandwidth applications VoIP Video applications Uptime Information gathering; identify symptoms and problems Identify the affected areas of the network Determine if anything has changed

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44 Conduct network monitoring to identify performance and connectivity issues using the following: 15, 18 18

45 Explain different methods and rationales for network performance optimization 18 18 18 18 18 18 18 18 18 18 18 15 15 15

Establish the most probable cause Determine if escalation is necessary Create an action plan and solution identifying potential effects Implement and test the solution Identify the results and effects of the solution Document the solution and the entire process Physical issues: Cross talk Near-end crosstalk Attenuation Collisions Shorts Open impedance mismatch (echo) Interference Logical issues: Port speed Port duplex mismatch Incorrect VLAN Incorrect IP address Wrong gateway Wrong DNS Wrong subnet mask Issues that should be identified but escalated: Switching loop Routing loop Route problems Proxy arp Broadcast storms Wireless Issues: Interference (bleed, environmental factors) Incorrect encryption Incorrect channel Incorrect frequency

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47 Given a scenario, troubleshoot common connectivity issues and select an appropriate solution 6 6 6 6 6 15 6 5 5 12 7, 15 7, 15 10, 15 7, 15 15 15 15 15 15 16 16 16 16

ESSID mismatch Standard mismatch (80211 a/b/g/n) Distance Bounce Incorrect antenna placement 50 Network Tools

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51 Given a scenario, select the appropriate command line interface tool and interpret the output to verify functionality TRACEROUTE IPCONFIG IFCONFIG PING ARP PING ARP NSLOOKUP HOSTNAME DIG MTR ROUTE NBTSTAT NETSTAT 52 Explain the purpose of network scanners Packet sniffers Intrusion detection software Intrusion prevention software Port scanners Cable testers Protocol analyzer Certifiers TDR OTDR Multimeter Toner probe Butt set Punch down tool 15 12 12 15 15 15 15 15 15 15 15 15 15 8, 15 15 15 7, 8, 9, 15 10, 15 15 10, 15 15 10, 15 8 8, 15 10, 15 8, 9, 10, 15

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61 Explain the function of hardware and software security devices Network-based firewall Host-based firewall IDS IPS VPN concentrator 62 Explain common features of a firewall Application layer vs network layer Stateful vs stateless Scanning services Content filtering Signature identification Zones 63 Explain the methods of network access security Filtering: ACL MAC filtering IP filtering Tunneling and encryption SSL VPN VPN L2TP PPTP IPSEC Remote access RAS RDP PPPoE PPP VNC ICA 11 17 17 11, 12 12 12 12 12 11, 12, 13 14 14 14 14 11, 14 14 14 17 17 17 17 17 17 17 17 12 12 12

64 Explain methods of user authentication PKI Kerberos AAA RADIUS TACACS+ Network access control 8021x CHAP MS-CHAP EAP 65 Explain issues that affect device security Physical security Restricting local and remote access Secure methods vs unsecure methods SSH, HTTPS, SNMPv3, SFTP, SCP TELNET, HTTP, FTP, RSH, RCP, SNMPv1/2 Security threats: DoS Viruses Worms Attackers Man in the middle Smurf Rogue access points Social engineering (phishing) Mitigation techniques: Policies and procedures User training Patches and updates 17 17 17 17 17 17 17 17 17 17 17 17 17 11 9, 11 9, 11 11 11 11 11 11 11 11 11 11 11