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10.2.1 WEP (Wired Equivalent Privacy)
WEP prevents people without the correct key from accessing the network. There are, however,
weaknesses in WEP. They include keys that are relatively short and other aws that allow keys
to be reconstructed from a relatively small amount of intercepted trac. WEP today is no longer
considered to provide adequate security as there are a variety of utilities freely available on the
web that can be used to crack what is meant to be a secret WEP key.
10.2.2 WPA/WPA2 (WiFi Protected Access)
WPA signicantly increases security by taking care of the shortcomings in the WEP standard.
WPA adds a standard way for distributing encrypted keys.
10.2.3 Recommendations
Some security guidelines when using wireless cameras for surveillance:
> Enable the user/password login in the cameras.
> Enable the encryption (HTTPS) in the wireless router/cameras. This should be done before the
keys or credentials are set for the WLAN to prevent unauthorized access to the network with
stolen credentials.
> Ensure that wireless cameras support security protocols such as IEEE 802.1X and WPA/WPA2.
10.3 Wireless bridges
Some solutions may use other standards than the dominating IEEE 802.11, providing increased
performance and much longer distances in combination with very high security. Two commonly
used technologies are microwave and laser, which can be used to connect buildings or sites with
a point-to-point high-speed data link.
WIRELESS TECHNOLOGIES - CHAPTER 10
- Table of contents 3
- Network technologies 69 5
- Wireless technologies 87 5
- Video management systems 91 5
- TABLE OF CONTENTS 5
- 1.2 Benets 8
- 1.3 Applications 12
- 1.3.4 Industrial 13
- 1.3.5 City surveillance 13
- 1.3.6 Government 13
- 1.3.7 Healthcare 13
- 1.3.8 Banking and nance 14
- Network cameras 15
- 2.2 Types of network cameras 16
- 2.2.1 Fixed network cameras 17
- 700 nm to 1000 nm range 22
- Camera elements 27
- 3.2 Lens elements 28
- 3.2.3 Lens mount standards 31
- 3.2.4 F-number and exposure 31
- 3.2.6 Depth of eld 33
- 3.3 Image sensors 34
- 3.3.3 Megapixel sensors 35
- 3.4.1 Interlaced scanning 35
- 3.4.2 Progressive scanning 36
- 3.5 Image processing 37
- 4.2 Transparent covering 40
- 4.4 Environmental protection 41
- 4.5.2 Mounting 42
- 4.6 Types of mounting 43
- 4.6.2 Wall mounts 44
- 4.6.3 Pole mounts 44
- 4.6.4 Parapet mounts 44
- 5.1 What is a video encoder? 45
- 5.5 Deinterlacing techniques 49
- 5.6 Video decoder 50
- Resolutions 51
- 6.2 VGA resolutions 52
- 6.3 Megapixel resolutions 53
- Video compression 55
- Earlier reference frame 57
- 7.2 Compression formats 59
- 7.2.2 MPEG-4 60
- 7.4 Comparing standards 61
- CHAPTER 7 - VIDEO COMPRESSION 62
- 8.1 Audio applications 63
- AUDIO Stream 64
- VIDEO Stream 64
- Recording/monitoring 64
- 8.3.1 Simplex 65
- 8.4 Audio detection alarm 66
- 8.5 Audio compression 66
- 8.5.1 Sampling frequency 67
- 8.5.2 Bit rate 67
- 8.5.3 Audio codecs 67
- Network technologies 69
- 9.1.2. Switch 71
- 9.1.3 Power over Ethernet 73
- 9.2 The Internet 75
- 9.2.1 IP addressing 76
- 9.2.1.1 IPv4 addresses 76
- 9.2.1.2 IPv6 addresses 80
- 9.3 VLANs 82
- 9.4 Quality of Service 82
- FTP 2 83
- Video 5 83
- HTTP 3 83
- 9.5 Network Security 84
- 9.5.4 HTTPS or SSL/TLS 85
- VPN tunnel 86
- HTTPS or SSL/TLS encryption 86
- Secure Non-secure 86
- Wireless technologies 87
- 10.1 802.11 WLAN standards 88
- 10.2 WLAN security 88
- 10.3 Wireless bridges 89
- Video management systems 91
- 11.1.2 NVR platform 92
- 11.2 Software platforms 93
- 11.3 System features 94
- 11.3.1 Viewing 95
- 11.3.2 Multi-streaming 95
- 11.3.3 Video recording 96
- 11.3.4 Recording and storage 97
- 11.3.7 Security 103
- 11.4 Integrated systems 104
- 11.4.3 Access control 105
- 11.4.4 Building management 105
- 11.4.6 RFID 106
- Table 12.1b 109
- Table 12.1c 109
- 12.2 Server-based storage 110
- 12.3 NAS and SAN 110
- 12.4 Redundant storage 112
- 12.5 System congurations 113
- Surveillance 114
- IP NETWORK 114
- Tools and resources 115
- Axis Communications’ Academy 117
- Contact information 118
- About Axis Communications 120
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Philips GC9641/60 manuali
Manuali dei proprietari e guide per l'utente per Postazioni per stirare Philips GC9641/60.
We fornisce 1 manuali pdf Philips GC9641/60 per scaricare gratuitamente in base al tipo di documento: Manuale Utente
Philips GC9641/60 Manuale Utente (46 pagine)
Marchio: Philips | Categoria: Steam ironing stations | Dimensione: 1.68 MB |
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