< Computer Support < Objectives

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.
  • 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

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