professor Messer 2.1 port numbers ocred.pdf

Cable modem *» Broadband # Transmission across multiple frequencies = Different traffic types # Data on the “cable” network # DOCSIS (Data Owver Cable Service Interface Specification) # High-speed networking » 4 Mbits/s through 250 Mbitss are common = Gigabit speeds are possible » Multiple service...

Cable modem *» Broadband # Transmission across multiple frequencies = Different traffic types # Data on the “cable” network # DOCSIS (Data Owver Cable Service Interface Specification) # High-speed networking » 4 Mbits/s through 250 Mbitss are common = Gigabit speeds are possible » Multiple services = Data, voice DSL modem = ADSL (Asymmetric Digital Subscriber Line) # Uses telephone lines » Download speed is faster than the upload speed [asymmetric) = ~10,000 foot limitation from the central office (CO) * 52 Mbit/s downstream [ 16 Mbit/s upstream are commen = Faster speeds may be possible if closer to the CO Patch panels s Combination of punch-down blocks and RI-45 connectors » Runs from desks are made once # Permanently punched down to patch panel = Patch panel to switch can be easily changed = No special tools = Use existing cables Power over Ethermet # Power provided on an Ethernet cable # One wire for both network and electricity = Phones, cameras, wireless access points # Useful in difficult-to-power areas = Power provided at the switch # Built-in power - Endspans = In-line power injector - Midspans PoE switch * Power over Ethernet = Commaonly marked on the switch or interfaces Ethernet over Power (EOP) » Also called Power-line communication (PLC) = |[EEE standard 1901 = 500 megabits per second = Standard includes links to the premise, intra-building networking, vehicles, smart energy devices, and more SMB - Server Message Block * Protocol used by Microsoft Windows » File sharing, printer sharing * Also called CIFS (Commen Internet File System) » Using NetBIOS over TCR/IP » udp137 - NetBIOS name services (nbname) # udp,138 - NetBIOS datagram service (nbdatagram) » tcp/139 - NetBIOS session service [nbsession) » Direct over tcp/445 (NetBl05-less) *# Diract SMB communication over TCP without the MetBIOS transport AFP (Apple Filing Protocol) # File services in macO5s * 1cp/548 * Works with SLP (Service Location Protocol) * tcp/427 and udpf427 # Populates the list of available devices + File management * Copy, move, delete files DHCP - Dynamic Host Configuration Protocol * Automated configuration of IP address, subnet mask and cther opticns » udp/67, udp,/68 # Requires a DHCP server » Server, appliance, integrated into a SOHO router, etc. * Dynamic / pooled » |P addresses are assigned in real-time from a pool » Each system is given a lease and must renew at set intervals * DHCP reservation + Addresses are assigned by MAC address in the DHCP server # Quickly manage addresses from one location LDAP (Lightweight Directory Access Protocol) » tcp/389 * Store and retrieve informatien in a network directory » Commonly used in Microsoft Active Directory SHMP - Simple Network Management Protocol * Gather statistics from network devices » Queries: udp /161 » Traps: udp/162 * vl —The original » Structured tables, in-the-clear * w2 — A pood step ahead » Data type enhancements » Bulk transfers, still in-the-clear * w3 — A secure standard » Message integrity * Authentication, encryption Protocol Port Name Description FTP 1cp/20, tcp21 File Transfer Protocol Sends and receives files between systems SSH tcp/22 Secure Shell Encrypted console access Telnet cp/23 Telecommunication Network Insecure console access SMTP tcp/25 Simple Mail Transfer Protocol Transfer email between mail servers DNS udp/53, tcp/53 Domain Name System Convert domain names to IP addresses HTTP tcp/80 Hypertext Transfer Protocol Web server communication HTTPS tcp/a43 Hypertext Transfer Protocol Secure Web server communication with encryption POP3 tcp/110 tp/143 Post Office Protocol version 3 Interet Message Access Protocol v Receive email into a email client RDP tcp/3389 Remote Desktop Protocol Graphical display of remote devices NetBIOS udp/137 NetBIOS name service Register, remove, and find Windows services by name NetBIOS udp/138 NetBIOS datagram service Windows connectionless data transfer NetBIOS tcp/139 NetBIOS session service Windows connection-oriented data transfer SMB tcp/445 Server Message Block Windows file transfers and printer sharing IMAP4 ‘ ‘ ‘ A newer email client protocol AFP tcp/548 Apple Filing Protocol Mac O file transfers SLp tcp/427, udp/427 Service Location Protocol Find Mac OS services by name DHCP udp/67, udp/68 Dynamic Host Configuration Protocol Automate the IP address configuration process LDAP tcp/389 Lightweight Directory Access Protocol Directory services SNMP udp/161 Simple Network Management Protocol ‘Gather metrics and manage network devices \ ‘ ‘ \ ‘ ‘