【判断题】209HS转向架摇枕吊由40Cr制成,调质处理,加工后进行电磁探伤。( )
【单选题】WHY DOES HTTP USE TCP AS THE TRANSPORT LAYER PROTOCOL?
A.
because transmission errors can be tolerated easily
B.
to ensure the fastest possible download speed
C.
because HTTP requires reliable delivery
D.
because HTTP is a best-effort protocol
【判断题】HTTP is the application layer protocol?
【判断题】由于数控车床具有直线和圆弧插补功能,所以可以车削任意直线和曲线组成的形状复杂的回转体零件
【单选题】Since HTTP is one of the most common protocols used in the internet, what should be done at a firewall level to ensure thatthe protocol is being used correctly? ()
A.
Ensure that a stateful firewall allows only HTTP traffic destined for valid web server IP addresses.
B.
Ensure that a firewall has SYN flood and DDoS protection applied specifically for valid web servers.
C.
Ensure that your firewall enforces HTTP protocol compliance to ensure that only valid flows are allowed inand outof your network.
D.
Ensure that HTTP is always authenticated.
E.
Ensure that your web server is in a different zone than your backend servers such as SQL and DNS.
【判断题】HTTP protocol only contains one framing technique.
【单选题】采用手工电弧焊方法焊接重要的焊接结构时,通常选用碱性焊条,原因是 ( ) 。
【判断题】HTTP is mainly a push protocol and SMTP is mainly a pull protocol