What is Ping?
Test connectivity between two devices on network with IPv4
What is Traceroute/Tracecert?
Displays path between your device (source) and the destination ip address including each route hop along the path.
- Tracecert -> Windows
- Traceroute -> Linux
What is ipconfig?
- IP Configuration
- View and renew TCP/IP configuration on a Windows system.
What is ifconfig?
- Interface Configuration (deprecated)
- View and renew TCP/IP configuration on a UNIX, Linux, or macOS system.
What is ip?
- Enables you to configure network interfaces on Linux.
- Older linux distribution uses ifconfig command.
What is nslookup?
- Name Server Lookup
- Performs manual DNS lookups
- More depth than “dig” command
What is dig?
- Used for troubleshooting DNS problems and display DNS information.
- Only available for Linux, Unix, and OS X systems by default
What is hostname?
Display the hostname assigned to a particular host/computer.
What is arp?
- Address Resolution Protocol (ARP)
- Enables you to view and work with IP address to MAC address resolution cache
What is “route” command?
View and configure the routes in routing table in a Windows, Linux, Unix, or OS X system
What is netstat?
- Network Statistics (netstat)
- Windows command
- Enables you to view the current TCP/IP connections on a system
What is telnet?
Remote access to a host in an unsecured manner
What is tcpdump?
Acts as a Linux-based packet analyzer
What is nmap?
- Network Mapper (nmap)
- Finds what ports are open and it is a popular vulnerability scanner
What are the 3 basic network commands?
- Show interface
- Show route
- Show config
What is netstat -b?
Display names of applications and executable file components accessing network
What is “show interface”?
Display statistics for the interface on configured on the router or access server.
What is “show config”?
Display current system configuration
What is “show route”?
Display routing table
What is “show mac address-table”?
Display mac address table maintain by the device
What is “show arp”?
Display ARP cache maintained by the router.
What is “show vlan”?
Display information about VLANs configured on a switch or router in Cisco IOS-based networking environments.
What is “show power”?
Display information about the power supply units and power usage on a switch or router in Cisco IOS-based networking environments.
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Network Concepts - OSI Model10
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IP Addresses17
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Protocols22
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Ports27
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Ethernet Twisted Pair Cabling14
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Fiber Standards12
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Transceivers7
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Routing Protocol Summary14
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Troubleshooting Command Line23
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SNMP / Network Logging10
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Troubleshooting Methodology8
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Wireless13
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Network Security34
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Threats and Vulnerabilities48
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Other Network+ Things to Know34
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Tools to know18
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Disaster Recovery6
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IEEE Standards10
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DNS Records19
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Network Definition14
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Networking Documentation13
