Thin vs. thick
■ Environmental factors
■ Concrete walls
■ Window film
■ Metal studs
■ Wireless standard related issues
■ Throughput
■ Frequency
■ Distance
■ Channels
✓ 4.4 Given a scenario, troubleshoot and resolve common copper cable issues
■ Shorts
■ Opens
■ Incorrect termination (mismatched standards)
■ Straight-through
■ Crossover
■ Crosstalk
■ Near end
■ Far end
■ EMI/RFI
■ Distance limitations
■ Attenuation/Db loss
■ Bad connector
■ Bad wiring
■ Split pairs
■ Tx/Rx reverse
■ Cable placement
■ Bad SFP/GBIC-cable transceiver
✓ 4.5 Given a scenario, troubleshoot and resolve common fiber cable issues
■ Attenuation/Db loss
■ SFP/GBIC-cable mismatch
■ Bad SFP/GBIC-cable or transceiver
■ Wavelength mismatch
■ Fiber type mismatch
■ Dirty connectors
■ Connector mismatch
■ Bend radius limitations
■ Distance limitations
✓ 4.6 Given a scenario, troubleshoot and resolve common network issues
■ Incorrect IP configuration/default gateway
■ Broadcast storms/switching loop
■ Duplicate IP
■ Speed and duplex commands
■ End-to-end connectivity
■ Incorrect VLAN assignment
■ Hardware failure
■ Misconfigured DHCP
■ Misconfigured DNS
■ Incorrect interface/interface misconfiguration
■ Cable placement
■ Interface errors
■ Simultaneous wired/wireless connections
■ Discovering neighboring devices/nodes
■ Power failure/power anomalies
■ MTU/MTU black hole
■ Missing IP routes
■ NIC teaming misconfiguration
■ Active-active vs. active-passive
■ Multicast vs. broadcast
✓ 4.7 Given a scenario, troubleshoot and resolve common security issues
■ Misconfigured firewall
■ Misconfigured ACLs/applications
■ Malware
■ Denial of service
■ Open/closed ports
■ ICMP related issues
■ Ping of death
■ Unreachable default gateway
■ Unpatched firmware/OSs
■ Malicious users
■ Trusted
■ Untrusted users
■ Packet sniffing
■ Authentication issues
■ TACACS/RADIUS misconfigurations
■ Default passwords/settings
■ Improper access/backdoor access
■ ARP issues
■ Banner grabbing/OUI
■ Domain/local group configurations
■ Jamming
✓ 4.8 Given a scenario, troubleshoot and resolve common WAN issues
■ Loss of internet connectivity
■ Interface errors
■ Split horizon
■ DNS issues
■ Interference
■ Router configurations
■ Customer premise equipment
■ Smart jack/NIU
■ Demarc
■ Loopback
■ CSU/DSU
■ Copper line drivers/repeaters
■ Common security policy
■ Throttling
■ Blocking
■ Fair access policy/utilization limits
■ Satellite issues
■ Latency
Chapter 5: Domain 5 Industry Standards, Practices, and Network Theory
✓ 5.1 Analyze a scenario and determine the corresponding OSI layer:
■ Layer 1 –
