Interface IP Address Configuration

Real World Application

As a Cisco Network Engineer, you will be required to know how to configure an IP Address on different types of interfaces. After all, what good is a Cisco router if it cannot route?
Assigning an IP address to an interface is the foundational requirement for all Cisco devices as Cisco devices are networking devices.
You can however assign multiple IPv4 addresses to a single interface but there is one catch. When dealing with dynamic routing protocols, advertisements are sourced from the primary address. Secondary addresses are commonly used during IP address migrations such as moving from a Class C to a Class A address scheme.

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Registered ports 2 (18406- 55901)

The range of port numbers from 1024 to 49151 are the registered ports. They are assigned by IANA for specific service upon application by a requesting entity. 

On most systems, registered ports can be used by ordinary users.

This is an incomplete list of notable ports. See the Service Name and Transport Protocol Port Number Registry of IANA for the complete list of assigned ports.

18506	TCP	UDP	Audition Online Dance Battle, Nexon Server	Unofficial
18605	TCP	UDP	X-BEAT—Status/Version Check	Unofficial
18606	TCP	UDP	X-BEAT	Unofficial
19000	TCP	UDP	Audition Online Dance Battle, G10/alaplaya Server—Status/Version Check	Unofficial
19000		UDP	JACK sound server	Unofficial
19001	TCP	UDP	Audition Online Dance Battle, G10/alaplaya Server	Unofficial
19226	TCP		Panda Software AdminSecure Communication Agent	Unofficial
19283	TCP	UDP	K2 - KeyAuditor & KeyServer, Sassafras Software Inc. Software Asset Management tools	Official
19294	TCP		Google Talk Voice and Video connections [109]	Unofficial
19295		UDP	Google Talk Voice and Video connections [109]	Unofficial
19302		UDP	Google Talk Voice and Video connections [109]	Unofficial
19315	TCP	UDP	KeyShadow for K2 - KeyAuditor & KeyServer, Sassafras Software Inc. Software Asset Management tools	Official
19540	TCP	UDP	Belkin Network USB Hub[citation needed]	Unofficial
19638	TCP		Ensim Control Panel[citation needed]	Unofficial
19812	TCP		4D database SQL Communication[citation needed]	Unofficial
19813	TCP		4D database Client Server Communication[citation needed]	Unofficial
19814	TCP		4D database DB4D Communication[citation needed]	Unofficial
19999			DNP - Secure (Distributed Network Protocol - Secure), a secure version of the protocol used in SCADA systems between communicating RTU's and IED's	Official
20000			DNP (Distributed Network Protocol), a protocol used in SCADA systems between communicating RTU's and IED's	Official
20000			Usermin, Web-based user tool	Unofficial
20014	TCP		DART Reporting server[citation needed]	Unofficial
20560	TCP	UDP	Killing Floor	Unofficial
20702	TCP		Precise TPM Listener Agent	Unofficial
20720	TCP		Symantec i3 Web GUI server	Unofficial
20790	TCP		Precise TPM Web GUI server	Unofficial
21001	TCP		AMLFilter, AMLFilter Inc. amlf-admin default port	Unofficial
21011	TCP		AMLFilter, AMLFilter Inc. amlf-engine-01 default http port	Unofficial
21012	TCP		AMLFilter, AMLFilter Inc. amlf-engine-01 default https port	Unofficial
21021	TCP		AMLFilter, AMLFilter Inc. amlf-engine-02 default http port	Unofficial
21022	TCP		AMLFilter, AMLFilter Inc. amlf-engine-02 default https port	Unofficial
22136	TCP		FLIR Systems Camera Resource Protocol	Unofficial
22222	TCP		Davis Instruments, WeatherLink IP	Unofficial
22347	TCP	UDP	WibuKey, WIBU-SYSTEMS AG Software protection system	Official
22349	TCP		Wolfson Microelectronics WISCEBridge Debug Protocol[110]	Unofficial
22350	TCP	UDP	CodeMeter, WIBU-SYSTEMS AG Software protection system	Official
23073			Soldat Dedicated Server	Unofficial
23399			Skype Default Protocol	Unofficial
23513			Duke Nukem 3D#Source code Duke Nukem Ports	Unofficial
24444			NetBeans integrated development environment	Unofficial
24465	TCP	UDP	Tonido Directory Server for Tonido which is a Personal Web App and P2P platform	Official
24554	TCP	UDP	BINKP, Fidonet mail transfers over TCP/IP	Official
24800			Synergy: keyboard/mouse sharing software	Unofficial
24842			StepMania: Online: Dance Dance Revolution Simulator	Unofficial
25000	TCP		Teamware Office standard client connection	Official
25003	TCP		Teamware Office client notifier	Official
25005	TCP		Teamware Office message transfer	Official
25007	TCP		Teamware Office MIME Connector	Official
25010	TCP		Teamware Office Agent server	Official
25560	TCP		codeheart.js Relay Server	Unofficial
25565	TCP		Standard Minecraft (Dedicated) Server	Unofficial
25565			MySQL Standard MySQL port	Unofficial
25570			Manic Digger default single player port	Unofficial
25826		UDP	collectd default port[111]	Unofficial
25888		UDP	Xfire (Firewall Report, UDP_IN) IP Address (206.220.40.146) resolves to gameservertracking.xfire.com. Use unknown.	Unofficial
25999	TCP		Xfire	Unofficial
26000		UDP	id Software's Quake server	Official
26000	TCP		id Software's Quake server	Official
26000	TCP		CCP's EVE Online Online gaming MMORPG	Unofficial
26850	TCP		War of No Return Server Port[citation needed]	Unofficial
26900	TCP		CCP's EVE Online Online gaming MMORPG	Unofficial
26901	TCP		CCP's EVE Online Online gaming MMORPG	Unofficial
27000-27030		UDP	Steam Client	Unofficial
27000		UDP	(through 27006) id Software's QuakeWorld master server	Unofficial
27000-27009	TCP		FlexNet Publisher's License server (from the range of default ports)	Unofficial
27010			Source engine dedicated server port	Unofficial
27014-27050	TCP		Steam Downloads	Unofficial
27014			Source engine dedicated server port (rare)	Unofficial
27015			GoldSrc and Source engine dedicated server port	Unofficial
27016			Magicka server port	Unofficial
27017			mongoDB server port	Unofficial
27374			Sub7 default.	Unofficial
27500-27900		UDP	id Software's QuakeWorld	Unofficial
27888		UDP	Kaillera server	Unofficial
27900-27901			Nintendo Wi-Fi Connection	Unofficial
27901-27910		UDP	id Software's Quake II master server	Unofficial
27950		UDP	OpenArena outgoing	Unofficial
27960-27969		UDP	Activision's Enemy Territory and id Software's Quake III Arena, Quake III and Quake Live and some ioquake3 derived games (OpenArena incoming)	Unofficial
28000			Bitfighter Common/default Bitfighter Server	Unofficial
28001			Starsiege: Tribes Common/default Tribes v.1 Server	Unofficial
28395	TCP		www.SmartSystemsLLC.com Used by Smart Sale 5.0[citation needed]	Unofficial
28785		UDP	Cube 2 Sauerbraten[112]	Unofficial
28786		UDP	Cube 2 Sauerbraten Port 2[112]	Unofficial
28852	TCP	UDP	Killing Floor	Unofficial
28910			Nintendo Wi-Fi Connection[113]	Unofficial
28960		UDP	Call of Duty; Call of Duty: United Offensive; Call of Duty 2; Call of Duty 4: Modern Warfare; Call of Duty: World at War (PC Version)	Unofficial
29000			Perfect World International Used by the Perfect World International Client	Unofficial
29070	TCP	UDP	Game titled "Jedi Knight: Jedi Academy" by Ravensoft	Unofficial
29292	TCP		TMO Integration Service Communications Port, Used by Transaction Manager SaaS (HighJump Software)[citation needed]	Unofficial
29900-29901			Nintendo Wi-Fi Connection[113]	Unofficial
29920			Nintendo Wi-Fi Connection[113]	Unofficial
30000			Pokémon Netbattle	Unofficial
30301			BitTorrent	Unofficial
30564	TCP		Multiplicity: keyboard/mouse/clipboard sharing software	Unofficial
30718		UDP	Lantronix Discovery for Lantronix serial-to-ethernet devices	Unofficial
30777	TCP		ZangZing agent	Unofficial
31337	TCP		Back Orifice—remote administration tool (often Trojan horse)	Unofficial
31415			ThoughtSignal—Server Communication Service (often Informational)	Unofficial
31456	TCP		TetriNET IRC gateway on some servers	Unofficial
31457	TCP		TetriNET	Official
31458	TCP		TetriNET Used for game spectators	Unofficial
31620	TCP	UDP	LM-MON (Standard Floating License Manager LM-MON)	Official
32123	TCP		x3Lobby Used by x3Lobby, an internet application.	Unofficial
32137	TCP		Immunet Protect[114]	Unofficial
32245	TCP		MMTSG-mutualed over MMT (encrypted transmission)	Unofficial
32769	TCP		FileNet RPC	Unofficial
32887	TCP		Used by "Ace of Spades" game	Unofficial
32976	TCP		LogMeIn Hamachi (VPN tunnel software; also port 12975)—used to connect to Mediation Server (bibi.hamachi.cc); will attempt to use SSL (TCP port 443) if both 12975 & 32976 fail to connect	Unofficial
33434	TCP	UDP	traceroute	Official
33982	TCP	UDP	Dezta software	Unofficial
34443			Linksys PSUS4 print server[citation needed]	Unofficial
34567	TCP		EDI service[115]	Official
36330	TCP		Folding@home v7 default for client control interface	Unofficial
36963		UDP	Any of the USGN online games, most notably Counter Strike 2D multiplayer (2D clone of popular CounterStrike computer game)	Unofficial
37659	TCP		Axence nVision[citation needed]	Unofficial
37777	TCP		Digital Video Recorder hardware[citation needed]	Unofficial
40000	TCP	UDP	SafetyNET p Real-time Industrial Ethernet protocol	Official
40123		UDP	Flatcast[116]	Unofficial
41823	TCP	UDP	Murealm Client[citation needed]	Unofficial
43047	TCP		TheòsMessenger second port for service TheòsMessenger[citation needed]	Official
43034	TCP	UDP	LarmX.com™ database update mtr port[citation needed]	Unofficial
43048	TCP		TheòsMessenger third port for service TheòsMessenger[citation needed]	Official
43594	TCP		RuneScape, FunOrb, Runescape Private Servers game servers	Unofficial
43595	TCP		RuneScape JAGGRAB servers	Unofficial
45824	TCP		Server for the DAI family of client-server products[citation needed]	Official
47001	TCP		WinRM - Windows Remote Management Service [117]	Official
47808	TCP	UDP	BACnet Building Automation and Control Networks (4780810 = BAC016)	Official
49151	TCP	UDP	Reserved[1]	Official
44405	TCP		Mu Online Connect Server	Unofficial
55901	TCP		Mu Online Game Server	Unofficial

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