Computer Support/Objectives/Networking

2.1 Compare and contrast Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) ports, protocols, and their purposes.

• Ports and protocols
  • 20/21 - File Transfer Protocol (FTP)
  • 22 - Secure Shell (SSH)
  • 23 - Telnet
  • 25 - Simple Mail Transfer Protocol (SMTP)
  • 53 - Domain Name System (DNS)
  • 67/68 - Dynamic Host Configuration Protocol (DHCP)
  • 80 - Hypertext Transfer Protocol (HTTP)
  • 110 - Post Office Protocol 3 (POP3)
  • 137/139 - Network Basic Input/Output System (NetBIOS)/NetBIOS over TCP/IP (NetBT)
  • 143 - Internet Mail Access Protocol (IMAP)
  • 161/162 - Simple Network Management Protocol (SNMP)
  • 389 - Lightweight Directory Access Protocol (LDAP)
  • 443 - Hypertext Transfer Protocol Secure (HTTPS)
  • 445 - Server Message Block (SMB)/Common Internet File System (CIFS)
  • 3389 - Remote Desktop Protocol (RDP)

• TCP vs. UDP
  • Connectionless
    • DHCP
    • Trivial File Transfer Protocol (TFTP)
  • Connection-oriented
    • HTTPS
    • SSH

2.2 Compare and contrast common networking hardware.

• Routers
• Switches
  • Managed
  • Unmanaged
• Access points
• Patch panel
• Firewall

• Power over Ethernet (PoE)
  • Injectors
  • Switch
  • PoE standards
• Hub
• Cable modem
• Digital subscriber line (DSL)
• Optical network terminal (ONT)
• Network interface card (NIC)
• Software-defined networking (SDN)

2.3 Compare and contrast protocols for wireless networking.

• Frequencies
  • 2.4GHz
  • 5GHz
• Channels
  • Regulations
  • 2.4GHz vs. 5GHz
• Bluetooth

• 802.11
  • a
  • b
  • g
  • n
  • ac (WiFi 5)
  • ax (WiFi 6)

• Long-range fixed wireless
  • Licensed
  • Unlicensed
  • Power
  • Regulatory requirements for wireless power
• NFC
• Radio-frequency identification (RFID)

2.4 Summarize services provided by networked hosts.

• Server roles
  • DNS
  • DHCP
  • Fileshare
  • Print servers
  • Mail servers
  • Syslog
  • Web servers
  • Authentication, authorization, and accounting (AAA)

• Internet applicances
  • Spam gateways
  • Unified threat management (UTM)
  • Load balancers
  • Proxy servers
• Legacy/embedded systems
  • Supervisory control and data acquisition (SCADA)
• Internet of Things (IoT) devices

2.5 Given a scenario, install and configure basic wired/wireless small office/home office (SOHO) networks.

• Internet Protocol (IP) addressing
  • IPv4
    • Private addresses
    • Public addresses
  • IPv6
  • Automatic Private IP Addressing (APIPA)
  • Static
  • Dynamic
  • Gateway

2.6 Compare and contrast common network configuration concepts.

• DNS
  • Address
    • A
    • AAAA
  • Mail exchanger (MX)
  • Text (TXT)
    • Spam management
      • DomainKeys Identified Mail (DKIM)
      • Sender Policy Framework (SPF)
      • Domain-based Message Authentication, Reporting, and Conformance (DMARC)

• DHCP
  • Leases
  • Reservations
  • Scope
• Virtual LAN (VLAN)
• Virtual private network (VPN)

2.7 Compare and contrast Internet connection types, network types, and their features.

• Internet connection types
  • Satellite
  • Fiber
  • Cable
  • DSL
  • Cellular
  • Wireless Internet service provider (WISP)

• Network types
  • Local area network (LAN)
  • Wide area network (WAN)
  • Personal area network (PAN)
  • Metropolitan area network (MAN)
  • Storage area network (SAN)
  • Wireless local area network (WLAN)

2.8 Given a scenario, use networking tools.

• Crimper
• Cable stripper
• WiFi analyzer
• Toner probe

• Punchdown tool
• Cable tester
• Loopback plug
• Network tap