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Lesson 1 review of foundation- 2bup
- 2. Network Administration and Maintenance Administrator sometimes abbreviated admin. is the one who is responsible for software installation, management, information and maintenance of a computer or network.
- 4. Network Administration and Maintenance Network Administrator is an individual that is responsible for the maintenance of computer hardware and software systems that make up a computer network including the maintenance and monitoring of active data network or converged infrastructure and related network equipment.
- 5. Network Administration and Maintenance Network Administrator Network Administrators are generally “mid-level support staff” within an organization and don't typically get involved directly with users.
- 6. Network Administration and Maintenance Network Administrator Network Administrators focus upon network components within a company's LAN/WAN infrastructure ensuring integrity. Depending on the company and its size, the Network Administrator may also design and deploy networks.
- 7. Sneak Peak What is that packet tracer? Packet Tracer is a powerful network simulation program that allows students to experiment with network behavior and ask “what if” questions. Packet Tracer provides simulation, visualization, authoring, assessment, and collaboration capabilities and facilitates the teaching and learning of complex technology concepts.
- 8. Network Administration and Maintenance Network Administrator The actual role of the network administrator will vary from place to place, but will commonly include activities and tasks such as network address assignment, management and implementation of routing protocols such as RIPv2, HSRP, routing table configurations and certain implementations of authentication (eg: challenge response, etc). It can also include maintenance of certain network servers: file servers, VPN gateways, intrusion detection systems, etc.
- 9. Network Administration and Maintenance Network Administrators are often involved in proactive work. This type of work will often include: Network monitoring Testing the network for weakness Keeping an eye out for needed updates Installing and implementing security programs In many cases, E-mail and Internet filters Evaluating implementing network management software
- 10. Data Communications and Computers Data are the quantities, characters, or symbols on which operations are performed by a computer, being stored and transmitted in the form of electrical signals and recorded on magnetic, optical, or mechanical recording media.
- 11. Data Communications and Computers Data vs information Data Data is raw, unorganized facts that need to be processed. Data can be something simple and seemingly random and useless until it is organized. Information When data is processed, organized, structured or presented in a given context so as to make it useful, it is called Information.
- 12. Data Communications and Computers Communication meaning to share is the activity of conveying information through the exchange of thoughts, messages, or information, as by speech, visuals, signals, writing, or behavior. It is the meaningful exchange of information between two or a group of person.
- 13. Looking Back Morse code Morse code is represented by On and Off tones, lights or clicked that can be understand by a skilled listener or observer w/out special equipment. It was standardized as dashes and dots or dits and dash.
- 14. Data Communications and Computers Communications can take many forms and occurs in many different environments: Spoken language Body language and facial expressions Pictures and written word
- 15. Data Communications and Computers In communication we establish rules, or protocols, for communicating with each other: Identify the sender and receiver. Agree on the method. Common language. Speed and delivery of the message. Confirmation that the message was received.
- 16. Data Communications and Computers Communications between individuals is successful if the meaning of the received message is the same as the meaning of the message that was sent.
- 17. Data Communications and Computers For data networks, we use the same basic criteria to judge successful communication. identify the sender and the receiver IP and MAC address Agree on the method. Network Protocols. Ex. TCP,UDP Common language OSI, TCP/IP models and binaries
- 18. Data Communications and Computers For data networks, we use the same basic criteria to judge successful communication. Speed and delivery of the message Bandwidth, Delays, Bottleneck Confirmation that the message received. TCP protocols acknowledgement.
- 19. Data Communications and Computers Also in data communication, it is also important that if the message was successfully sent and received. A successful message is when you received the correct packets and their numbers.
- 20. Looking Back What is a packet? A packet is one unit of binary data capable of being routed through a computer network. To improve communication performance and reliability, each message sent between two network devices is often subdivided into packets by the underlying hardware and software.
- 21. Looking Back Depending on the protocol(s) they need to support, packets are constructed in some standard packet format.
- 22. Looking Back
- 23. Looking Back The receiving device is responsible for re- assembling individual packets into the original message, by stripping off the headers and footers and concatenating packets in the correct sequence.
- 24. Looking Back However, there are external factors that can affect the message. The quality of the pathway between the sender and the recipient. The number of times the message has to change form or be redirected or re-addressed. The number of other messages being transmitted simultaneously on the communication network. The amount of time allotted for successful communication.
Editor's Notes
- Average salary is around $75000 annually, which is almost 300000 pesos. The average pay for a Network Administrator is PHP 208,913 per year. Most people with this job move on to other positions after 20 years in this career.
- “Basically ang Network Administrator” ay ung tinatawag nating tagapamahala or tagapanatili ng mga bagay-bagay sa isang network.” “So ano ung mga bagay-bagay na yon? Yun ung mga Computer Hardwares within a network (but lets just give that work to the technicians since that’s what they were hired for. Sakali lang na wala sila dun eh atleast may knowledge ang Network Administrator sa hardwares.) ung hardware lang naman na dapat mong masterin or matutunan as net admin ay ung mga bagay-bagay na related lang sa Computer Network. (network devices). So pag nasira ba ung processor eh would you consider that as network administrator job? – (!?) Pero if nasira ang LAN Card? Or if nginatngat ng daga ung UTP cable. Sila din ang namamahala ng mga Software systems na bumubuo sa isang network like Servers OS, Database servers (but not in maintain database but ung pag sesetup or tagapanatili ng database software such as MySql) and mga applications that involved in a network. Sila din ang nag mamaintain at nag momonitor ng mga “Data” na pinapasa sa isang network.
- So kayo rin a tinatawag na support. So aun nga support kayo pero d kayo involved sa interaction sa users, but rather you are involved at the back end ng isang organization. When we say mid level… of course there are what you call the low level and the high level. So ung low level… typically, they are the one who accepts calls, or received the problem from the client or within the organization. -we call them often as a help desk. -if the problem is at the network. they will file a ticket to the mid level support. That ticket contains the whole information about the problem. -if they alone can solve the problem, then they don’t need to escalate it to the mid level support. Then what is the high level support then? -let us say that the ticket was escalated to you as a mid level support, then it means that the low level support cant handle the problem alone. -when you received the ticket, then its now your job to fix the problem with your expertise. -the problem is, not all of the this ticket can be solved alone with network administrator. Sometimes… you require a help by much higher level… -and there will the high level support came in… mostly they are what we call the network engineers, or sometimes the network programmer.
- So ayan na ang LAN / WAN. Dyan na kayo nakafocus. Iyan na talaga ang pinakamamasterin ninyo kasi lahat ng involved dyan ay work na ninyo. Dapat ninyong panatilihin na gumagana at secured ang isang network. Depende daw sa company, pero actually its really your job to design and deploy a network. (panu kayo nag design ng network dati? – (!?) Using cisco packet tracer, dun ka mag dedesign ng isang network.)
- So jan papasok ung mga Scripting na tinatawag natin. Simpleng drag and drop pero lalagyan ng script para masetup ung tamang configuration ng routers, range ng mga ips, etc. within a network. So madugong computation tayo jan.
- *Data - Data ung mga characters, symbols or electrical signals on your computer. Ung mga data na un eh pwedeng marecord or masave sa magnetic disk, optical or mechanical recording media. So baka nag tataka kayo kung pano sila nasasave, jan pumapasok ung binaray which is 101010101. Nasasave yan as high and low out put tpos iyon lang ung binabasa ng computer mo. So high is 1 and low is 0. this binary files (which are not human-readable, 1010101) are sometimes called "data" as distinguished from human-readable "text". So yang mga binary nay an 10101010 ay may katumbas na text para maintindihan nating mga human. Kc hindi talaga nakakabasa ng text ang ating mga computer but rather they can read this 1 and 0 by sequence. Its just translated to us like ascii. American Standard Code for Information Interchange So w/out data, walang computer since our computer is based on data to run. (ung machine language natin, ung nakikita ninyong 1010101 etc also known as binary which is what our computer really understand.
- So napakaimportante ng morsecode na yan dahil it was mainly used as distressed signal before. So if may lulubog na barko. They are sending what you call the universal distressed signal which is the 3 dots, 3 dashes and 3 dots. SOS. Save our soul. •Trivia: did you know that nokias ringtones got a hidden morsecodes? So the Standard. Or tootootoot toootooo tootootoot. Means SMS Ascending means “connecting people”
- •So a successful communication means an intact message. •So sample ng failed communication is ung sa text. Some message is missing. •Or ung pag naguusap kau sa phone eh nagiging choppy ung signal.
- So yang mga rules na yan ay implemented din sa Data networks.
- So yang mga rules na yan ay implemented din sa Data networks.
- oThe quality of the pathway between the sender and the recipient. So along the way that your message has been transported. Iba2x ang dadaan nyan. So may chance na hindi n makarating ung packets sayo due to pathway. oThe number of other messages being transmitted simultaneously on the communication network. Maaring magkaruon ng bottle neck in which your packet get destroyed.