MAC Address or media access control address is a unique ID assigned to network interface cards (NICs). It is also known as a physical or hardware address. It identifies the hardware manufacturer and is used for network communication between devices in a network segment. MAC Address usually consists of six groups of two hexadecimal digits. The valid MAC address is C3:00: 50: 00: FF: FF. Hence, the correct answer is option “A”. Explanation of Solution. MAC address: It stands for Media Access Control address. It is a unique number used to build communication at the link layer. Enter to Search. My Profile Logout. Free Ru Information Technologies Pvt Ltd. IOS Version 1.2 Full Specs.
About MAC Address Lookup Tool
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MAC Address Lookup Tool searches your MAC Address or OUI in mac address vendor database. The MAC Address vendor database consists of a list of mac addresses of all devices manufactured till date. Finding the mac address from this database tells us which manufacturer originally manufactured this device and what is the prefix, postfix of a given mac address, moreover it tells us what country was this device manufactured. All this information is useful if you want to verify the generated mac address with the original vendor of this device in OUI vendor database.
What is a MAC Address?
MAC Address or media access control address is a unique ID assigned to network interface cards (NICs). It is also known as a physical or hardware address. It identifies the hardware manufacturer and is used for network communication between devices in a network segment. MAC Address usually consists of six groups of two hexadecimal digits.
The network adapters or network interface cards always come with a MAC address which is fed into hardware, usually in read-only memory (ROM), or BIOS system. The physical address is stored into the NIC by its manufacturer, that is why this address is also called a burned-in address (BIA) or ethernet hardware address.
There are several NIC manufacturers; some well-known of them are Dell, Cisco, Belkin. The first three sets of two hexadecimal numbers in a MAC Address identifies the card manufacturer, and this number is called OUI (organizationally unique identifier). OUI is always the same for NICs manufactured by the same company. For example, let's say a network card manufactured by dell has a physical address:
00-14-22-04-25-37
, in this address, 00-14-22
is the OUI of Dell which identifies that the device is by Dell. It may be interesting for you to know that all the OUIs are registered and assigned to the manufacturers by IEEE.How to Find MAC Address?
To find MAC Address, see the instructions given below for popular operating systems.
How to Find MAC Address in Windows?
- Go to Command Prompt
- Press Windows + R
- Type
cmd
and press Enter - Click Start Button
- Type
cmd
and press Enter
OR- In Command Prompt, type
ipconfig/all
and press Enter - And locate for the 'Physical Address' or 'HWaddr' field. The Physical Address should be in format
M:M:M:S:S:S
. For example:00-14-22-04-25-37
How to Find MAC Address in MacOS?
- Click on Apple Menu (usually on top left corner), and click
System Preferences
- In
System Preferences
, clickView
menu and selectNetwork
- In the
Network
window that just opened, click theWi-Fi
,Ethernet
, orAirport
icon on left. - Now click
Advanced
on bottom right. - From the upper menu, click
Hardware
, and look forMAC Address
field. - Your
MAC Address
should be in the format:M:M:M:S:S:S
. For example:00-14-22-04-25-37
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How to Find MAC Address in Linux or Unix?
- Perform the following as super user (or with appropriate permissions)
- Type
ifconfig -a
- Look for 'eth0'. This is your default ethernet adapter
- Now locate the field 'HWaddr'. The value displayed next to it is your MAC Address.
- Your MAC Address should be in this format:
00-14-22-04-25-37
- Type
How to Find MAC Address in iOS?
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![Mac Mac](/uploads/1/2/9/3/129309277/449207862.jpeg)
- Open
Settings
app. - Tap on
General
option in settings. - Now tap on
About
option. - Locate the field
Wi-Fi Address
- The value against this field is your MAC Address
- Your
MAC Address
should be in the format:M:M:M:S:S:S
. For example:00-14-22-04-25-37
Finding a MAC Address in Android
- Method 1:
- Open
Settings
app. - Select the option
Wireless & Networks
- Select
Wi-Fi Settings
- Select
Advanced
, and your wireless network card's MAC Address should appear here.
- Open
- Method 2:
- Open
Settings
app. - Select the option
About Device
- Tap on the option
Hardware Info
- Select
Advanced
, and your wireless network card's MAC Address should appear here.
- Open
Macrophage-1 antigen (or integrin αMβ2 or macrophage integrin or Mac-1) is a complement receptor ('CR3') consisting of CD11b (integrin αM) and CD18 (integrin β2).[1]
The integrin α chain is noncovalently bound to the integrin β chain. It binds to iC3b and can be involved in cellular adhesion, binding to the intercellular adhesion molecule-1 (ICAM-1).[2][3] CR3 causes phagocytosis and destruction of cells opsonized with iC3b. CR3 and CR4 are thought to exhibit overlapping functions; however, the distinct binding sites to iC3b suggests differences in their functions.[4] Additionally, CR3 has been shown to have therapeutic promise.[5][6][7]
Function[edit]
Macrophage-1 antigen (hereafter complement receptor 3 or CR3) (CD11b/CD18) is a human cell surface receptor found on B and T lymphocytes, polymorphonuclear leukocytes (mostly neutrophils), NK cells, and mononuclear phagocytes like macrophages. CR3 is a pattern recognition receptor, capable of recognizing and binding to many molecules found on the surfaces of invading bacteria. CR3 also recognizes iC3b when bound to the surface of foreign cells. iC3b is generated by proteolysis of C3b and binding to the receptor causes phagocytosis and destruction of the foreign cell opsonized with iC3b.
CR3 belongs to a family of cell surface receptors known as integrins (because they share this particular β chain, they are referred to as β2-integrins), which are extremely widely distributed throughout nature and which generally are important in cellular adhesion, migration, phagocytosis and other cell-cell interactions in a variety of cells and circumstances.[4]
Upregulation of Mac-1 in the presence of certain factors such as IL-2 may cause a prolongation of the life of the immune cell while the presence of TNF-α induces apoptosis and selective removal of the cell.
A fully activated neutrophil may express on its membrane 200,000 or more CR3 molecules.
Absence of CR3 results in reduced binding and ingestion of Mycobacterium tuberculosis in mice. In human mononuclear phagocytes, phagocytosis of Mycobacterium tuberculosis is mediated in part by human monocyte complement receptors including CR3.[8]
CR3 has also been shown to mediate phagocytosis of the Lyme disease causing bacterium, Borrelia burgdorferi, in the absence of iC3b opsonization.[9]
CR3 and CR4[edit]
CR3 and CR4, both members of the β2-integrin family, are generally thought to exhibit overlapping functions in myeloid cells and certain lymphoid populations.[4] CR3 and CR4 have been shown to be 87%[4] homologous via sequence analysis of human cDNA of the α chains; however, the complement receptors bind at distinct sites of iC3b and the intracellular domains differ in length and amino acid sequence, suggesting further differences in their functions.[4] Further, CR3 favors binding to positively charged species, while CR4 binds negatively charged species.[10] It has been shown that both CR3 and CR4 are found in mice and humans.[4] Together, CR3 and CR4 are involved in various functions of the T and B lymphocytes and NK cells. For instance, while both CR3 and CR4 are involved in adhesion, migration and proliferation of B cells, they are involved in enhancing complement-dependent cytotoxicity in NK cells.[4]
CR3 and CR4 for Disease Therapy[edit]
Immunomodulatory therapies often aim for an induced reduction of symptoms in inflammatory disease or supported elimination of malignancies. Counter strike for mac os torrent. In vitro and in vivo experiments suggest a response of CR3 and CR4 to enable complement-dependent cell cytotoxicity towards antibody-coated cancer cells.[5][6] Such biological therapeutic targeting is characterized by lowering autoimmune inflammation or enhancing anti-cancer vaccination effects.
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Leukadherin-1, a CR3 agonist molecule, has been shown to suppress human innate inflammatory signals. Its anti-inflammatory effect mediation further provides support for its therapeutic promise in animal models of vascular injury.[7]
Synonyms and abbreviations[edit]
- CR3
- CD11b/CD18
- Macrophage 1 antigen (Mac-1)
![C3 for mac pro C3 for mac pro](/uploads/1/2/9/3/129309277/353654599.jpg)
See also[edit]
References[edit]
- ^Todd R (1996). 'The continuing saga of complement receptor type 3 (CR3)'. J. Clin. Invest. 98 (1): 1–2. doi:10.1172/JCI118752. PMC507390. PMID8690779.
- ^Abbas AK, Lichtman AH, Pillai S (2017-03-10). Cellular and Molecular Immunology (Ninth ed.). Philadelphia, PA. ISBN978-0-323-52323-3. OCLC973917896.
- ^Ross GD, Vĕtvicka V (May 1993). 'CR3 (CD11b, CD18): a phagocyte and NK cell membrane receptor with multiple ligand specificities and functions'. Clinical and Experimental Immunology. 92 (2): 181–4. doi:10.1111/j.1365-2249.1993.tb03377.x. PMC1554824. PMID8485905.
- ^ abcdefgErdei, Anna; Lukácsi, Szilvia; Mácsik-Valent, Bernadett; Nagy-Baló, Zsuzsa; Kurucz, István; Bajtay, Zsuzsa (2019). 'Non-identical twins: Different faces of CR3 and CR4 in myeloid and lymphoid cells of mice and men'(PDF). Seminars in Cell & Developmental Biology. 85: 110–121. doi:10.1016/j.semcdb.2017.11.025. PMID29174917.
- ^ abHu, X.; Wohler, J. E.; Dugger, K. J.; Barnum, S. R. (2010-03-01). '2-Integrins in demyelinating disease: not adhering to the paradigm'. Journal of Leukocyte Biology. 87 (3): 397–403. doi:10.1189/jlb.1009654. ISSN0741-5400. PMC3212424. PMID20007244.
- ^ abJoshi, Medha D.; Unger, Wendy J.; Storm, Gert; van Kooyk, Yvette; Mastrobattista, Enrico (2012). 'Targeting tumor antigens to dendritic cells using particulate carriers'. Journal of Controlled Release. 161 (1): 25–37. doi:10.1016/j.jconrel.2012.05.010. PMID22580109.
- ^ abBednarczyk, Monika; Stege, Henner; Grabbe, Stephan; Bros, Matthias (2020-02-19). 'β2 Integrins—Multi-Functional Leukocyte Receptors in Health and Disease'. International Journal of Molecular Sciences. 21 (4): 1402. doi:10.3390/ijms21041402. ISSN1422-0067. PMC7073085. PMID32092981.
- ^Schlesinger LS, Bellinger-Kawahara CG, Payne NR, Horwitz MA (1990). 'Phagocytosis of Mycobacterium tuberculosis is mediated by human monocyte complement receptors and complement component C3'. J. Immunol. 144 (7): 2771–80. PMID2108212.
- ^Hawley KL; Olson Jr. CM. (2012). 'CD14 Cooperates with Complement Receptor 3 to mediate MyD88-Independent Phagocytosis of Borrelia burgdorferi'. Proc Natl Acad Sci USA. 109 (4): 1222–32. Bibcode:2012PNAS.109.1228H. doi:10.1073/pnas.1112078109. PMC3268315. PMID22232682.
- ^Vorup-Jensen, Thomas; Jensen, Rasmus Kjeldsen (2018-11-26). 'Structural Immunology of Complement Receptors 3 and 4'. Frontiers in Immunology. 9: 2716. doi:10.3389/fimmu.2018.02716. ISSN1664-3224. PMC6275225. PMID30534123.
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Further reading[edit]
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- Wagner C, Hänsch GM, Stegmaier S, Denefleh B, Hug F, Schoels M (April 2001). 'The complement receptor 3, CR3 (CD11b/CD18), on T lymphocytes: activation-dependent up-regulation and regulatory function'. Eur. J. Immunol. 31 (4): 1173–80. doi:10.1002/1521-4141(200104)31:4<1173::AID-IMMU1173>3.0.CO;2-9. PMID11298342.
- Rooyakkers AW, Stokes RW (September 2005). 'Absence of complement receptor 3 results in reduced binding and ingestion of Mycobacterium tuberculosis but has no significant effect on the induction of reactive oxygen and nitrogen intermediates or on the survival of the bacteria in resident and interferon-gamma activated macrophages'. Microb. Pathog. 39 (3): 57–67. doi:10.1016/j.micpath.2005.05.001. hdl:2429/15708. PMID16084683.
External links[edit]
- Macrophage-1+antigen at the US National Library of Medicine Medical Subject Headings (MeSH)
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Macrophage-1_antigen&oldid=977679260'