一、应用程序和应用层协议 应用程序:沟通,分布式的进程

一、因特网:工程视角 数以百万计的互联计算设备

Properties of herpesviruses Enveloped double stranded DNA viruses. Genome consisits of long and short fragments which may be orientated in either direction, giving a total of 4 isomers

Hemorrhogic Fever Virus Hantaar Virus or HEMORRHAGIC FEVER with renal syndrome virus HFRS Xing Jiang Hemorrhogic Fever Virus Dept. of microbiology and parasitology

Human cytomegalovirus Epstein-Barr- virus Herpes simplex virus Yellow fever virus Rubella

Similar to Viruses Atypical Agents Small Filterable Need host cells No machinery for energy generation of protein synthesis

Live difficult diagnosis clinical picture, skin biopsy, corneal impression(antibodies only appear very late) Dead- brain sent to Onderstepoort Negri bodies in cytoplasm of brain cells; immunofluorescence virus isolation

球形,100-140nm,有包膜,包■通过血液途径、性 膜外有刺突 途径和垂直传播

一、什么是安全性? 1 密码术 2 报文鉴别

实时协议(Real -Time- Protocol,RTP) 一、为实时应用程序提供标准化格式的分组 二。一般在UDP之上运行