Remote Desktop Connection

Sebuah kasus, seorang karyawan yang bekerja memonitoring semua traffik pemakaian jasa interenet. Pada saat tertentu, ia dikejutkan dengan telp yang intinya ada suatu network yang trouble. Karena ia berada di luar kantor ia g bisa memonitoring langsung traffiknya. Akhirnya malam-malam ia harus datang ke kantor untuk mengecek traffiknya. Hal ini justru akan merepotkan kita, Bayangkan aja, tengah malam harus datang ke kantor untuk mengecek data, traffik di monitoring kantor. Alangkah lebih baik kalau hal itu bisa kita kerjakan di rumah, kita bisa mengoperasikan komputer di kantor tanpa harus datang ke lokasi ? Betul g ?

Penasaran ga’ gimana caranya kita di rumah bisa meremot komputer di kantor, g usah bingung-bingung banyak sekali aplikasi remot dekstop tersebar di dunia maya, ada yang free, free trial, bahkan ada yang berbayar, Namun kali ini shfind akan membahas aplikasi remot dekstop yang free dan tidak perlu instaal aplikasinya, karena emang dari sananya sudah ada di dalam Windows XP.

Remote Dekstop Connection merupakan Aplikasi bawaan Windows XP, setiap kali install Windows XP, Remote Dekstop pasti sudah terinstall. Hal ini memudahkan untuk melakukan remote komputer dari tempat jauh. Dengan ini kita bisa mengoperasikan langsung komputer di kantor. Se akan-akan kita berada di depan langsung komputer kantor, padahal posisi kita di rumah. Penasaran caranya gimana …. ? Gini caranya :

Pastikan komputer yang akan diremot, sudah diaktifkan services remote dekstop connectionnya. Untuk mengaktifkannya, klik kanan pada mycomputer à pilih propertis, maka akan tampil window System Properties à pilih tab remote. Nah ada dua pilihan yang pertama Allow Remote Assistance invitations … pastikan opsi ini di pilih. Serta Allow users to connect remotely … pastikan opsi ini juga dipilih.

Jika sudah semua, sekarang bisa meremot komputer tersebut. Buka aja di start menu à Accessories à Communication à Remote Desktop Connection. Nah dari ini masukkan aja IP kompute yang akan di remote. Trus kita masukkan username password untuk bisa login ke komputer yang diremot.

Selamat Mencoba

Map Network Drive ..

Mapping Drive

Penulis menulis postingan ini, karena penulis merasa kesulitan jika ingin mengambil file data dari komputer lain. Mungkin bisa dikerjakan dengan simple, dengan cara mengcopy langsung ke disket, flasdisk, atau sejenisnya. Tetapi semua itu butuh waktu yang cukup lama. Kita harus cari dulu disket, flasdisknya, kemudian kita ke komputer yang akan diambil filenya untuk mengcopy data ke flasdisk, dan dicopy lagi ke komputer yang baru. Gimana hal ini butuh waktu yang cukup lama kan ?

Nah ada cara yang lebih mudah, cepat dan efisien. Dengan memanfaatkan Kabel UTP, kita bikin LAN ( Local Area Network ). Kalau sudah tersambung di LAN, komputer yang akan di copy datanya, tinggal di share aja foldernya.

Klik kanan pada folder yang ingin di share, dan pilih Sharing and Security ..
Nah di sini terserah mo kita set share full ( orang lain dapat menambah, merubah atau menghapus data ) atau hanya dishare ( user tidak dapat menambah, merubah atau menghapus data ).

• Share this folder on network ( jika hanya memilih pilihan ini, maka user hanya dapat melihat file ytang ada)
  
• Allow network users to change my files ( jika disertai memilih pilihan ini, maka user dapat menambah, merubah, menghapus data)

Nah sekarang, kita bikin Map Network Drive … Maksudnya kita ciptakan partisi baru di windows kita, biasanya partisi drive didapat dari partisi hardisk, namun kali ini bisa membuat partisi dari LAN, dan penyimpanannya pun enggak di hardisk kita, namun di hardisk komputer yang di share sebelumnya.

• Windows Explorer
• Pilih My Network Places
• Pilih Entire Network
• Pilih Microsoft Windows Network
• Cari komputer yang akan kita jadikan partisi baru, misal gambar di bawah ini.
  

Kalau sudah ketemu, tinggal di klik kanan, pilih Map Network Drive … kalau sudah, kita cek aja di Windows Explorer kita, maka akan muncul partisi driver yang baru. Jadi kita g perlu lagi pake flasdisk untuk copy antar komputer, tinggal buka windows explorer, udah terlihat deh semua file2 di komputer lain.

Selamat mencoba

NIC (Network Interface Card)

NICs are considered Layer 2 devices because each individual NIC throughout the world carries a unique code, called a Media Access Control (MAC) address. This address is used to control data communication for the host on the network. You will learn more about the MAC address later. As the name implies, the NIC controls the host's access to the medium.

In some cases the type of connector on the NIC does not match the type of media that you need to connect to. A good example is your Cisco 2500 router. On the router you will see AUI (Attachment Unit Interface) connectors and you need to connect the router to a UTP Cat5 Ethernet cable. To do this a transceiver (transmitter/receiver) is used. A transceiver converts one type of signal or connector to another (e.g. to connect a 15-pin AUI interface to an RJ-45 jack, or to convert electrical signals to optical signals). It is considered a Layer 1 device, because it only looks at bits, and not at any address information or higher level protocols.

NICs have no standardized symbol. It is implied that whenever you see networking devices attached to network media, there is some sort of NIC or NIC-like device present even though it is generally not shown. Wherever you see a dot on a topology, there is either a NIC or an interface (port), which acts like at least part of a NIC.

Network ??? What this .... ?

A computer network is an interconnection of a group of computers. Networks may be classified by what is called the network layer at which they operate according to basic reference models considered as standards in the industry such as the four-layer Internet Protocol Suite model. While the seven-layer Open Systems Interconnection (OSI) reference model is better known in academia, the majority of networks use the Internet Protocol Suite (IP) as their network model.

Computer networks may be classified according to the scale: Personal area network (PAN), Local Area Network (LAN), Campus Area Network (CAN), Metropolitan area network (MAN), or Wide area network (WAN). As Ethernet increasingly is the standard interface to networks, these distinctions are more important to the network administrator than the end user. Network administrators may have to tune the network, based on delay that derives from distance, to achieve the desired Quality of Service (QoS). The primary difference in the networks is the size.

Personal Area Network (PAN)
A personal area network (PAN) is a computer network used for communication among computer devices close to one person. Some examples of devices that may be used in a PAN are printers, fax machines, telephones, PDAs or scanners. The reach of a PAN is typically within about 20-30 feet (approximately 6-9 Meters). PANs can be used for communication among the individual devices (intrapersonal communication), or for connecting to a higher level network and the Internet (an uplink).

Personal area networks may be wired with computer buses such as USB[3] and FireWire. A wireless personal area network (WPAN) can also be made possible with network technologies such as IrDA and Bluetooth.

Local Area Network (LAN)
A network covering a small geographic area, like a home, office, or building. Current LANs are most likely to be based on Ethernet technology. For example, a library will have a wired or wireless LAN for users to interconnect local devices (e.g., printers and servers) connect to the internet. All of the PCs in the library are connected by category 5 (Cat5) cable, running the IEEE 802.3 protocol through a system of interconnection devices and eventually connect to the internet. The cables to the servers are on Cat 5e enhanced cable, which will support IEEE 802.3 at 1 Gbps.

All interconnected devices must understand the network layer (layer 3), because they are handling multiple subnets (the different colors). Those inside the library, which have only 10/100 Mbps Ethernet connections to the user device and a Gigabit Ethernet connection to the central router, could be called "layer 3 switches" because they only have Ethernet interfaces and must understand IP. It would be more correct to call them access routers, where the router at the top is a distribution router that connects to the Internet and academic networks' customer access routers.

The defining characteristics of LANs, in contrast to WANs (wide area networks), include their much higher data transfer rates, smaller geographic range, and lack of a need for leased telecommunication lines. Current Ethernet or other IEEE 802.3 LAN technologies operate at speeds up to 10 Gbit/s. This is the data transfer rate. IEEE has projects investigating the standardization of 100 Gbit/s, and possibly 40 Gbit/s. Inverse multiplexing is commonly used to build a faster aggregate from slower physical streams, such as bringing 4 Gbit/s aggregate stream into a computer or network element with four 1 Gbit/s interfaces.

Campus Area Network (CAN)
A network that connects two or more LANs but that is limited to a specific and contiguous geographical area such as a college campus, industrial complex, or a military base. A CAN, may be considered a type of MAN (metropolitan area network), but is generally limited to an area that is smaller than a typical MAN.

This term is most often used to discuss the implementation of networks for a contiguous area. For Ethernet based networks in the past, when layer 2 switching (i.e., bridging (networking) was cheaper than routing, campuses were good candidates for layer 2 networks, until they grew to very large size. Today, a campus may use a mixture of routing and bridging. The network elements used, called "campus switches", tend to be optimized to have many Ethernet-family (i.e., IEEE 802.3) interfaces rather than an arbitrary mixture of Ethernet and WAN interfaces.

Metropolitan Area Network (MAN)
A Metropolitan Area Network is a network that connects two or more Local Area Networks or Campus Area Networks together but does not extend beyond the boundaries of the immediate town, city, or metropolitan area. Multiple routers, switches & hubs are connected to create a MAN

Wide Area Network (WAN)
A WAN is a data communications network that covers a relatively broad geographic area (i.e. one city to another and one country to another country) and that often uses transmission facilities provided by common carriers, such as telephone companies. WAN technologies generally function at the lower three layers of the OSI reference model: the physical layer, the data link layer, and the network layer.

Monitoring Traffic "showtraffic"

Hi Friend, You all surely have at soybean cake which its name of virus ? So now I attacked by virus resulting dead LAN Office. Just because a virus in one of the computer LAN Office, as a result all dead LAN Office. Most really disturbing once

Initially I don't know, usually that virus attack system or attack data. But after there is software " Showtraffic" I know its cause ? In the reality this virus every second deliver big enough data package out. As a result LAN Office traffik only fulfilled by big packages, and other Computer don't get traffik to access to internet.

If friends wish to try this application, please download here. In fact this application many kok in internet, live in search later then download. With this application is we can know late traffik in LAN Office ethernet interface. Become we can know, which computer is which deliver factious data package, automatically mean the the computer there is which don't all right, He he He

Congratulation Try and Error ... Useful hopefully.

IP Address - Network Numbering

ven without subnetting (explained later), hosts on the Internet or any other IP network are assigned a network number. Network numbering allows a group of hosts (peers) to communicate efficiently with each other. Hosts on the same network may be computers located in the same facility or all computers used by a workgroup, for example. Multi-homed hosts, that contain multiple network adapters, can belong to multiple networks, but each adapter is assigned exactly one network number.

Network numbers look very much like IP addresses, but the two should not be confused. Consider for example the host IP address 10.0.0.1, an address commonly used on private networks. Because it is a Class A address, with no subnetting employed, its leftmost byte (eight bits) by default refer to the network address and all other bits remain set at zero. Thus, 10.0.0.0 is the network number corresponding to IP address 10.0.0.1.

The portion of the IP address that does not refer to the network refers instead to the host address - literally, the unique identifier of the host on that network. In the above example, the host address becomes '0.0.0.1' or simply '1'. Also note that a network address becomes a reserved address that should not be assigned to any actual host. Configuring a live host at 10.0.0.0 in the example above could impact communications for all hosts on that network.

The table below illustrates the default numbering scheme for Class A, B, and C networks.

• Clas A | 0.0.0.0 - 127.255.255.255 | x.0.0.0 | 255.0.0.0
• Clas B | 128.0.0.0 - 191.255.255.255 | x.x.0.0 | 255.255.0.0
• Clas C | 192.0.0.0 - 223.255.255.255 | x.x.x.0 | 255.255.255.0

In general, a network address uses the leftmost byte of its hosts' addressing if the hosts fall within the Class A range, the leftmost two bytes for hosts in Class B, and the leftmost three bytes for hosts in Class C. This algorithm is applied in practice through the use of a network mask. The above table shows the decimal representation of the default network masks that is commonly used by network operating systems. Note that the decimal value '255' corresponds to one byte that has all bits set to one (11111111).