1. Media and Medium Jason Smith November 11, 2015

2. Transmission Media Coaxial Cable Twisted Pair Copper Cable Fiber-optic Cable Wireless

3. Coaxial Cable Two types –ThinNet (10Base2) 10 Mbps, 30 nodes per segment, max 180 meters LAN –ThickNet (10Base5) 10 Mbps, 100 nodes per segment, max 500 meters Backbone Insecure –Coax is easy to splice

4. Twisted Pair Copper Cable Copper wire Twist reduces EMI Classified by transmission rates –Cat3, Cat5, Cat5e, Cat6

5. Fiber-Optic Cable Glass core with plastic shielding Small, light, fragile, and expensive Very fast transmission rate Can transmit data very far Immune to interference Hard to splice

6. Wireless Microwave, radio and infrared

7. Security Concerns Easy to insert a node or splice into network Most attacks involve eavesdropping or sniffing Physical security War driving

8. Storage Media Magnetic Storage Optical Media Solid-State Storage Media

9. Magnetic Storage Floppy Disks –8”, 5.25” –3.5” Double Density – 800KB High Density – 1.4MB Zip Disks –100MB, 250MB, 750MB Other Disks –Jazz, Pocket Zip, Super Disk, Tape Backup

10. Magnetic Storage – Hard Drives Around $1/GB Three interfaces –SCSI Introduced in early 1980’s Very fast, reliable, expensive Up to 320MB/s Up to 16 devices –IDE / ATA Cheap, common, easy to setup Somewhat unreliable –Serial ATA Introduced in 2002 150MB/s Hot-plugging capability Serial Attached SCSI

11. Optical Media - CD CD-ROM, CD-R, CD-RW Typically store 700MB 1.8GB/$

12. Optical Media - DVD Digital Versatile Disc Typically store 4 to 17GB Standards –DVD, DVD-RAM, DVD-R, DVD-R/W, DVD+R/W Non-standards –DVD-VCD, DVD-SVCD, DVD-MP3

13. Optical Media - DVD Future Standards –DVD+RW DL 8.5GB DVD+RW Alliance Available now –DVD HD 20+GB Toshiba and NEC Available in 2005 –Blu-ray 27GB on single sided, single layer disc blue-violet laser Panasonic, Pioneer, Sharp, Samsung, Sony

14. Solid-State Storage Media No moving parts Slow/fast Very small Generally used in cameras, PDAs, etc. Several types –CompactFlash (1GB) –Memory Stick (512MB) –Secure Digital (512MB) –Smart Media (128MB)

15. Security Concerns