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A USB header is a group of pins, typically on a computer motherboard or expansion card, to which an internal USB cable can be attached to provide extra USB ports. Typically, one header is a group of two USB ports.
The most common USB header layout is:
5v, D-, D+, Gnd, NC
5v, D-, D+, Gnd, Key
Some may be in reverse order, or completely different, so caution is advised.
Manufacturers generally design USB headers on to their motherboards if they have extra USB ports left over from the design of the rear I/O. Instead of terminating these extra USB ports, they can be left as USB headers to be used by some other means.
Many computer cases feature "Front USB Ports". These front USB ports connect to the USB headers on the motherboard. This is the most common use for USB headers.
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There are several varieties of header pin layouts ranging from 4 pin, to 10 pin, The most common ones are 5 pin for single USB header, to 9 pin for dual USB, where pin 9 and 10 are not used. Pin 9 and blank pin 10 are to ensure the plug is inserted correctly.
Some 9 pin header plugs have different places where the blank pin is and also a different wiring order. You must have the right wiring order and plug for your device, and to your motherboard, or you may do some serious damage to your PC and/or USB devices. It is wise to always double check the pins and wiring via a PC Tech before buying and installing any internal after market USB device.
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Contrast the IPv4 and the IPv6 header fields?
Simplified header format. IPv6 has a fixed length header, which does not include most of the options an IPv4 header can include. Even though the IPv6 header contains two 128 bit addresses (source and destination IP address) the whole header has a fixed length of 40 bytes only. This allows for faster processing. Options are dealt with in extension headers, which are only inserted after the IPv6 header if needed. So for instance if a packet needs to be fragmented, the fragmentation header is inserted after the IPv6 header. The basic set of extension headers is defined in RFC 2460.
Why does the TCP header have a header length field and UDP header does not?
in tcp header (32 bits) we have a field that is called options and padding that has variable in length and the header length shows the actual header size i.e size of 20 octets+size of options and padding field and in UDP we dont have any field like that and its header is fixed of 8 OCTETS (32 bits header size) refrence: WIRELESS COMMUNICATIONS AND NETWORKS by William Stallings Second Edition pg 91(see fig)
Minimum bytes in IPv4 header?
Minimal bytes required in IPv4 header are 20 i.e. 20 bytes are mandatory. And total bytes in IPv4 header are 60.
What is onboard USB?
Onboard USB are USB ports built into the motherboard.
Which protocol's header includes the source MAC address?
The Ethernet protocol's header includes the source MAC address.
What is the USB JTAG used for?
"A USB JTAG cable allows you to use your computer to connect to a JTAG scan chain. This lets you program devices on a logic board. In order to accomplish this though, you will also need the Diligent Adept Suite."
What is the correct order for PDU encapsulation?
Frame Header - Network Header - Transport Header - Data - Frame Trailer
What is the first row of a table in excel?
It is sometimes referred to as the header row.It is sometimes referred to as the header row.It is sometimes referred to as the header row.It is sometimes referred to as the header row.It is sometimes referred to as the header row.It is sometimes referred to as the header row.It is sometimes referred to as the header row.It is sometimes referred to as the header row.It is sometimes referred to as the header row.It is sometimes referred to as the header row.It is sometimes referred to as the header row.
What are the different types of headers in football?
Diving header, glancing header and powerful header.
What is the section is used for placing the text that appears in the beginning of every page?
The Header.
A--is text and graphics that print at the top of each page?
Text printed at the top of the page is called a header.
What is the different between header file and header pointer?
Header file is a file which is meant to be included into another file during compilation. Examples: string.h, stdio.h, inttypes.h. Header pointer is a pointer to an object called header (for example header of a linked list).
What is meant by function header in java?
That means, the header of a function. The header is the top part, before the opening braces.
What are the basic elements of an email message?
the email address of the receiver, the header and the message
What type of ribbons or data cables would you find in a PC?
IDE Cable (40 Pins for Hard Disk and CD/DVD)Sata Cable (For SATA Hard Disk)34 Pins Flat Cable (For Floppy Drive)80 Pins SCSI Cable (Normally in Server, Not in Desktops)USB header cableGame Port header cable
If a ball hits your hair does it count as a header?
No it does not count as a header
What option describes objects workbook or worksheet or header?
header
