Maximum-Receive-Unit (MRU)

定义于：RFC 1661

Description

This Configuration Option may be sent to inform the peer that the

implementation can receive larger packets, or to request that the

peer send smaller packets.

The default value is 1500 octets. If smaller packets are

requested, an implementation MUST still be able to receive the

full 1500 octet information field in case link synchronization is

lost.

Implementation Note:

This option is used to indicate an implementation capability.

The peer is not required to maximize the use of the capacity.

For example, when a MRU is indicated which is 2048 octets, the

peer is not required to send any packet with 2048 octets. The

peer need not Configure-Nak to indicate that it will only send

smaller packets, since the implementation will always require

support for at least 1500 octets.

A summary of the Maximum-Receive-Unit Configuration Option format is

shown below. The fields are transmitted from left to right.

0 1 2 3

0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Type | Length | Maximum-Receive-Unit |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Type

1

Length

4

Maximum-Receive-Unit

The Maximum-Receive-Unit field is two octets, and specifies the

maximum number of octets in the Information and Padding fields.

It does not include the framing, Protocol field, FCS, nor any

transparency bits or bytes.

magnetic resonance urography

MRU:华为语音中心交换设备扩展处理板。

例如：softco系列设备 SC-MRU-64板=SoftCo的64路语音处理板，包含1个100Base-TX管理接口和1个Console口。

WINDOWS操作系统中的MRU

当你在“运行”对话框中成功地运行一个命令，或是在“查找”对话框中成功地查找到一个文件后，你所键入的字符串就会保存在它的下拉列表中。Windows 认为这样可便于你下次再用到它，这些东西就是"MRU" 了！MRU的全称为Most Recently Used,直译理解为最近最多用过的。

但如果下拉列表中的东西太多了，或是你不想别人知道你曾经运行过或查找过什么，怎样才能删掉这些"MRU"清理"MRU"呢？先在“运行”对话框中运行“regedit ”，依次找到HKEY_CURRENT_USER\\Softerware\\Microsoft\\Windows\\CurrentVersion\\Explorer。在此文件夹下你会发现一个"RunMRU"文件夹,“运行”对话框的"MRU" 即在其中。单击"RunMRU" 文件夹，再在右边的窗口里找到你要删的"MRU" 项，删掉即可。而“查找”对话框中的"MRU" 则在相同路径下的"Doc Find Spec MRU" 文件夹中。

尿路造影

核磁共振尿路成像，利用MR水成像原理显示尿路系统的成像技术。