In an organizational context, networks provided the means for allowing the computing power available to be used to its most complete extent MORE
In November, researchers from cybersecurity firm Invincea reported a vulnerability that could have allowed hackers to infect Belkin WeMo smart plugs with malware. The flaw was located in a configuration protocol that worked over the local area network and didn't require any authentication. In 2015, when researchers from vulnerability intelligence firm Rapid7 analyzed nine Internet-connected baby monitors, they found hardcoded credentials in four of them. MORE
Cisco Networking Storage Cisco DCNM Cisco MDS 9000 Cisco Nexus 9000 FCIP FCoE LAN SAN convergence storage networking Tony AntonyWith all the ingredients finally in place in one family of switches and a revised family of storage directors, will convergence happen at last? Read More. MORE
I wrote and published a script that enabled wake on lan two years ago. Since then, I have needed to write new scripts to modify the advanced tab of the NIC properties. MORE
Volumes have been written regarding the damage that electrical transients, surges, and improper grounding techniques can cause to sensitive computer equipment ? including many of my previous posts. Instead of providing details on the subject of power protection per se, I will concentrate this time on test equipment that a typical network administrator might use MORE
A variety of devices, including cabling system testers, power line monitors, and analog and digital interface diagnosis equipment will be discussed. This is by no means an exhaustive list. Each network, because of its uniqueness, will require additions and deletions to this smorgasbord. Use it only as a guide?a a starting point for assembling your own tool kit MORE
IBM also supported a wide variety of other software interfaces, as well, including IEEE's Logical Link Control (LLC). In addition, IBM sold a number of Ethernet (802.3) related products during this time as a hedge MORE
So, the next grouping of posts will focus on some specific layer standards that we use in LANs every day MORE
IBM did not, for the most part, sell SNA as a generalized networking solution independent of its own product line. It was designed to be a networking solution primarily revolving around an information environment that has IBM-designed large or mid-range computers at the center MORE
TCP provides the packet sequencing, error control, and other services required to provide reliable end-to-end communications while IP takes the packet from TCP and passes it through whatever gateways are needed, for delivery to the remote TCP layer through the remote IP layer. Some networks, in fact, could use IP but not TCP, preferring instead to use some alternative protocol at the transport layer MORE
The concept of an overarching connectivity architecture such as SAA was one approach to managing these compromises. One clearly evident (if not explicitly stated) IBM strategy in managing outside competition was to coopt popular technology MORE
Each of the services implied by these protocols should generally be present in any implementation of TCP/IP, although SMTP was not always supported by microcomputer-based systems MORE
LANs are rapidly becoming a basic building block in the structuring of truly global networks that will make the ideal of a global village possible MORE
TCP segments user data into manageable units, then appends a TCP header that includes the destination port, segment sequence number, and checksum to test for errors in transmission MORE
Nokia announced on Tuesday its official entry into the passive optical LAN (POL) market for on-premises data centers. Read More. Connectivity Networking POL MORE
After seeing this smorgasbord of equipment available for helping you to test and troubleshoot your network, the next logical question is, "Which tools should I purchase for my network?" Here are some guidelines MORE
The appropriate solution was to have only the connection to the LAN with the LAN gatewayed to the larger network and providing the appropriate terminal emulation MORE
Particularly in the areas of microcomputers, LANs, and enterprise networking, IBM's insistence that its customers remain "pure blue" ran against both the economic and technological developments set in motion before 1990 MORE
In the effort to find out how microcomputers were being used, even as early as 1982, as well as to refine further the meaning of "office automation," respondents to a survey were asked to list the uses their organizations made of micro computers MORE
Softros LAN Messenger is an easy-to-use LAN messaging application for safe, secure and effective intra-office communication and does not require a server or Internet to run and is very easy to install. Softros LAN Messenger. LAN, WAN, VPN and VLAN Support. MORE
A good example was Novell's NetWare 4.x product, announced in mid-1993. Competition from IBM?s s OS2 and Microsoft?s s Windows NT server would soon eclipse Novell?s s efforts MORE
Given the digital transmission nature of baseband LANs, one might easily overlook the need for analog test equipment. Three devices are valuable additions to the tool kit: the volt-ohm-milliameter (VOM), the oscilloscope, and the transmission impairment measurement system (TIMS MORE
High-bandwidth technologies are necessary primarily for three reasons: increased traffic on local LAN segments, internetworking between local and remote LAN segments and high-bandwidth desktop applications MORE
The earlier manifestations of the PC-based LANs, by way of contrast, were not designed to provide connectivity except to a file server and to other micros on the network MORE
It was certainly a big deal many decades ago: the notion that one of your desktop drives ("H:") could actually be shared with your co-workers over a LAN. Chucks Blog. An IT industry insiders perspective on information, technology and customer challenges. Archives. Profile. MORE
With the development of higher-speed (14,400 b/s and higher), reasonably priced telephone modems, the situation was changing. Because analog telephone service is electronically noisy, however, the extensive error-correction techniques necessary for high-speed dial access service resulted in unpredictable service, which may limit throughput MORE
PU-T2.1 was defined in 1983 and is designed for peer-to-peer coupling (for PCs, for example) or subarea routing. The former is, in principle, nonmediated?that that is, it is not necessary for routing through VTAM or NCP, although two PCs communicating with one another through different SNA cluster controllers will probably have to pass through the Communications FEP MORE
Support for resource sharing is particularly important since in a modern data communications network one primary objective is (or should be) extensive connectivity among end-users and devices MORE
SNA is a layered architecture similar to the International Standards Organization's Open Systems Interconnection (OSI) model. SNA proper is divided into only five (not seven) layers?End End User and Physical layers are not part of the formal scope of SNA MORE
Starting at the Data Link layer, ARCNET, IEEE 802, or Ethernet LANs have been frequently implemented for network access MORE
Companies such as Bridge Communications, Ungermann-Bass, AT&T, and Wang were major players, or at least they were attempting to be MORE
The digital (or discrete) signal levels present at the LAN interfaces to PCs, printers, modems and other peripherals are the test points most familiar to network managers MORE
DEC's implementation of Ethernet was sufficiently important to its view of networking. As a note, DEC was bought out by Compaq which was later acquired by HP MORE
Cloud Computing Data Center Jobs Networking Virtualization API jobs LAN software-defined networking The digitization of the modern data center has created the need for even more robust services and control methods. MORE
Where have you seen a terminal lately? No where. PCs very quickly became those terminals through emulation software. PCs could be both and do both better. The era of terminals was dead MORE
LAN Related Topics Data Center Knowledge
OCTOBER 19, 2016
Cisco Networking Storage Cisco DCNM Cisco MDS 9000 Cisco Nexus 9000 FCIP FCoE LAN SAN convergence storage networking Tony AntonyWith all the ingredients finally in place in one family of switches and a revised family of storage directors, will convergence happen at last? Read More.
IT Toolbox
JUNE 15, 2017
Particularly in the areas of microcomputers, LANs, and enterprise networking, IBM's insistence that its customers remain "pure blue" ran against both the economic and technological developments set in motion before 1990
IT Toolbox
FEBRUARY 7, 2017
So, the next grouping of posts will focus on some specific layer standards that we use in LANs every day
IT Toolbox
JANUARY 26, 2017
LANs are rapidly becoming a basic building block in the structuring of truly global networks that will make the ideal of a global village possible
IT Toolbox
APRIL 28, 2017
The appropriate solution was to have only the connection to the LAN with the LAN gatewayed to the larger network and providing the appropriate terminal emulation
IT Toolbox
JUNE 18, 2016
The LAN protocol analyzer can capture, record, and analyze frames that have been transmitted on the LAN. They must therefore contain a NIC for that particular LAN, and will attach to the backbone cable in the same way that any workstation would connect
IT Toolbox
APRIL 30, 2017
A good example was Novell's NetWare 4.x product, announced in mid-1993. Competition from IBM?s s OS2 and Microsoft?s s Windows NT server would soon eclipse Novell?s s efforts
IT Toolbox
MAY 29, 2016
Given the digital transmission nature of baseband LANs, one might easily overlook the need for analog test equipment. Three devices are valuable additions to the tool kit: the volt-ohm-milliameter (VOM), the oscilloscope, and the transmission impairment measurement system (TIMS
IT Toolbox
JUNE 13, 2016
The digital (or discrete) signal levels present at the LAN interfaces to PCs, printers, modems and other peripherals are the test points most familiar to network managers
IT Toolbox
JANUARY 17, 2017
Where have you seen a terminal lately? No where. PCs very quickly became those terminals through emulation software. PCs could be both and do both better. The era of terminals was dead
Mick's IT Blog
APRIL 20, 2016
I wrote and published a script that enabled wake on lan two years ago. Since then, I have needed to write new scripts to modify the advanced tab of the NIC properties.
Galido
SEPTEMBER 13, 2016
Softros LAN Messenger is an easy-to-use LAN messaging application for safe, secure and effective intra-office communication and does not require a server or Internet to run and is very easy to install. Softros LAN Messenger. LAN, WAN, VPN and VLAN Support.
IT Toolbox
FEBRUARY 14, 2017
With the development of higher-speed (14,400 b/s and higher), reasonably priced telephone modems, the situation was changing. Because analog telephone service is electronically noisy, however, the extensive error-correction techniques necessary for high-speed dial access service resulted in unpredictable service, which may limit throughput
IT Toolbox
MAY 23, 2016
Volumes have been written regarding the damage that electrical transients, surges, and improper grounding techniques can cause to sensitive computer equipment ? including many of my previous posts. Instead of providing details on the subject of power protection per se, I will concentrate this time on test equipment that a typical network administrator might use
IT Toolbox
MARCH 12, 2017
PU-T2.1 was defined in 1983 and is designed for peer-to-peer coupling (for PCs, for example) or subarea routing. The former is, in principle, nonmediated?that that is, it is not necessary for routing through VTAM or NCP, although two PCs communicating with one another through different SNA cluster controllers will probably have to pass through the Communications FEP
IT Toolbox
APRIL 16, 2017
In the effort to find out how microcomputers were being used, even as early as 1982, as well as to refine further the meaning of "office automation," respondents to a survey were asked to list the uses their organizations made of micro computers
IT Toolbox
MAY 16, 2016
A variety of devices, including cabling system testers, power line monitors, and analog and digital interface diagnosis equipment will be discussed. This is by no means an exhaustive list. Each network, because of its uniqueness, will require additions and deletions to this smorgasbord. Use it only as a guide?a a starting point for assembling your own tool kit
IT Toolbox
MARCH 9, 2017
SNA is a layered architecture similar to the International Standards Organization's Open Systems Interconnection (OSI) model. SNA proper is divided into only five (not seven) layers?End End User and Physical layers are not part of the formal scope of SNA
IT Toolbox
MARCH 26, 2017
DEC's implementation of Ethernet was sufficiently important to its view of networking. As a note, DEC was bought out by Compaq which was later acquired by HP
IT Toolbox
MARCH 20, 2017
The concept of an overarching connectivity architecture such as SAA was one approach to managing these compromises. One clearly evident (if not explicitly stated) IBM strategy in managing outside competition was to coopt popular technology
Chuck's Blog - EMC
JANUARY 15, 2013
It was certainly a big deal many decades ago: the notion that one of your desktop drives ("H:") could actually be shared with your co-workers over a LAN. Chucks Blog. An IT industry insiders perspective on information, technology and customer challenges. Archives. Profile.
IT Toolbox
MARCH 9, 2017
Support for resource sharing is particularly important since in a modern data communications network one primary objective is (or should be) extensive connectivity among end-users and devices
IT Toolbox
FEBRUARY 16, 2017
IBM did not, for the most part, sell SNA as a generalized networking solution independent of its own product line. It was designed to be a networking solution primarily revolving around an information environment that has IBM-designed large or mid-range computers at the center
Data Center Knowledge
SEPTEMBER 17, 2013
Cloud Computing Data Center Jobs Networking Virtualization API jobs LAN software-defined networking The digitization of the modern data center has created the need for even more robust services and control methods.
Network World
DECEMBER 29, 2016
In November, researchers from cybersecurity firm Invincea reported a vulnerability that could have allowed hackers to infect Belkin WeMo smart plugs with malware. The flaw was located in a configuration protocol that worked over the local area network and didn't require any authentication. In 2015, when researchers from vulnerability intelligence firm Rapid7 analyzed nine Internet-connected baby monitors, they found hardcoded credentials in four of them.
IT Toolbox
JUNE 25, 2016
After seeing this smorgasbord of equipment available for helping you to test and troubleshoot your network, the next logical question is, "Which tools should I purchase for my network?" Here are some guidelines
IT Toolbox
FEBRUARY 15, 2017
TCP provides the packet sequencing, error control, and other services required to provide reliable end-to-end communications while IP takes the packet from TCP and passes it through whatever gateways are needed, for delivery to the remote TCP layer through the remote IP layer. Some networks, in fact, could use IP but not TCP, preferring instead to use some alternative protocol at the transport layer
IT Toolbox
FEBRUARY 15, 2017
Each of the services implied by these protocols should generally be present in any implementation of TCP/IP, although SMTP was not always supported by microcomputer-based systems
IT Toolbox
FEBRUARY 15, 2017
TCP segments user data into manageable units, then appends a TCP header that includes the destination port, segment sequence number, and checksum to test for errors in transmission
Data Center Knowledge
APRIL 6, 2016
Nokia announced on Tuesday its official entry into the passive optical LAN (POL) market for on-premises data centers. Read More. Connectivity Networking POL
IT Toolbox
FEBRUARY 16, 2017
IBM also supported a wide variety of other software interfaces, as well, including IEEE's Logical Link Control (LLC). In addition, IBM sold a number of Ethernet (802.3) related products during this time as a hedge
IT Toolbox
JANUARY 18, 2017
High-bandwidth technologies are necessary primarily for three reasons: increased traffic on local LAN segments, internetworking between local and remote LAN segments and high-bandwidth desktop applications
IT Toolbox
JULY 31, 2016
Starting at the Data Link layer, ARCNET, IEEE 802, or Ethernet LANs have been frequently implemented for network access
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