A network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lights and electrical equipment
Two factors may interfere with the copper cabling and result in signal distortion and data corruption are :
EMI
RFI
Explanation:
- EMI (electromagnetic interference) is the disruption of operation of an electronic device when it is in the vicinity of an electromagnetic field (EM field) in the radio frequency (RF) spectrum that is caused by another electronic device.
- During EMC testing, radiated emissions measurements are made using a spectrum analyzer and or an EMI receiver and a suitable measuring antenna.
- EMI (Electromagnetic Interference) is also called RFI (Radio Frequency Interference).
- Conducted RFI is unwanted high frequencies that ride on the AC wave form. Radiated RFI is emitted through the air. There are many pieces of equipment that can generate RFI, variable frequency drives included.
- The internal circuits of personal computers generate EM fields in the RF range.
Answer:
filter
Explanation:
Some email programs let you use a filter to move incoming mail to a specific folder or to delete it automatically based on the content of the message.
The filter performs this role by either automatically deleting or moving to another location.
Most messages that are moved or deleted are unsolicited emails or spam messages.
Filtering of your mails helps so you ou can manage your incoming mail using filters to send email to a label, or archive, delete, star, or automatically forward your mail.
This is a way of organising your correspondence.
Specialized search engines indexes content specialized by topic or location and are used to deliver more relevant results to the user. It indexes pages for particular topics. Examples of specialized search engines and their applications include;
1. Uquery.com – This new search engine focuses more on the emergence of iPhone and iPod touch applications
2. Taptu.com – A downloadable search engine that helps the user find items specific to fit on a mobile screen
3. Yahooligans – A sub-domain of yahoo that focuses on kid friendly games.
4. Pubmed.com – This is specifically meant for students in medical schools
5. Zillow.com – Online real estate service that provides information regarding home purchase.
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