Frame. Relay is simplified form. of(71), similar in principle to(72), in which synchronous, frames of data are routed to different destinations depending on header information.Packets are routed throught one or more Virtual Circuits known as(73)Most Virtual Circuits are(74), which means that the network provider sets up all DLCI connections at subscription time.(75)are also part of the Frame. Relay specification. They privide a link that only lasts only as long as the session.A．Datagram SwitchingB．Datagram RoutingC．Packet SwitchigD．packet Routing
Frame. Relay is simplified form. of(71), similar in principle to(72), in which synchronous, frames of data are routed to different destinations depending on header information.
Packets are routed throught one or more Virtual Circuits known as(73)Most Virtual Circuits are(74), which means that the network provider sets up all DLCI connections at subscription time.(75)are also part of the Frame. Relay specification. They privide a link that only lasts only as long as the session.
A．Datagram Switching
B．Datagram Routing
C．Packet Switchig
D．packet Routing
相关考题：
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Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an(71)from a friend who asks you to open it. This is what happens with Melissa and several other similar email(72). Upon running, such worms usually proceed to send themselves out to email addresses from the victim's address book, previous emails, web pages(73)As administrators seek to block dangerous email attachments through the recognition of well-known(74), virus writers use other extensions to circumvent such protection. Executable(.exe)files are renamed to .bat and .cmd plus a whole list of other extensions and will still nm and successfully infect target users.Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the(75)access to your network.A．attachmentB．packetC．datagramD．message
Mobile computers-which(71)laptops, notebooks, subnotebooks and handhelds-(72)so ubiquitous in such a short time, no surprise to hear who say: "It will define the leading edge(73)the next five years or so." The most remarkable(74)mobile computers is the amount of data storage and memory packed(75)their tiny boxes. These devices not only handle windows easily but also run storage-hungry programs.A．includedB．includeC．have includedD．have becomeE．had become
1、下列序列中哪个是最小堆？A．2, 55, 52, 72, 28, 98, 71B．2, 28, 71, 72, 55, 98, 52 C．2, 28, 52, 72, 55, 98, 71D．28, 2, 71, 72, 55, 98, 52
某试样硬度测定时的5个值分别是70、71、72、73、71，则其中值为。A．70B．71C．72D．73