[Assassins]

Computer Networks


Год выпуска: 2013
Производитель: Coursera / University Of Washington
Сайт производителя: https://www.coursera.org/course/comnetworks
Автор: David Wetherall, Arvind Krishnamurthy and John Zahorjan
Продолжительность: 23:11:12
Тип раздаваемого материала: Видеоурок
Язык: Английский
Описание: Курс об основах компьютерных сетей

Computer networks from ISPs to WiFi and cellular networks are a key part of the information economy. These networks are the foundation for the Web, and they enable companies such as Google, Facebook and Amazon. This course introduces the fundamental problems of computer networking, from sending bits over wires to running distributed applications. For each problem, we explore the design strategies that have proven valuable in practice. Topics include error detection and correction, multiple-access, bandwidth allocation, routing, internetworking, reliability, quality of service, naming, content delivery, and security. As we cover these topics, you will learn how the internals of the Internet work to support the Web and other networked applications. You will develop a detailed understanding of widely-used networking technologies such as TCP/IP, HTTP, 802.11, Ethernet, and DNS.

Introduction, Protocols and Layering
Physical and Link layers
Retransmissions, Multiple access, Switching
Network layer, Internetworking
Intra- and Inter-domain Routing
Transport layer, Reliability
Congestion Control
DNS, Web/HTTP, Content Distribution
Quality of Service and Real-time Apps
Network Security

Файлы примеров: отсутствуют
Формат видео: MP4
Видео: AVC, 960x540, 16:9, 29.970 fps, 391 Kbps
Аудио: AAC, 44.1 KHz, 128 Kbps, Stereo

General
Complete name : 1 - 6 - 1-6 Protocol Layers (1713).mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 21.2 MiB
Duration : 17mn 13s
Overall bit rate mode : Variable
Overall bit rate : 172 Kbps
Writing application : Lavf53.29.100

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 17mn 13s
Bit rate : 46.2 Kbps
Width : 960 pixels
Height : 540 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.003
Stream size : 5.69 MiB (27%)
Writing library : x264 core 120 r2120 0c7dab9
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=28.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 17mn 13s
Bit rate mode : Variable
Bit rate : 118 Kbps
Maximum bit rate : 128 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz
Compression mode : Lossy
Delay relative to video : 67ms
Stream size : 14.5 MiB (68%)

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