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An RPC server may be unavailable for a number of reasons. If the service that a client is attempting to contact no longer exists or has been moved to a different location, the RPC server will appear unavailable because it cannot fulfill the client’s request. Another reason an RPC server may be unavailable is that the network is experiencing hardware or software-related difficulties that must be repaired before the RPC server can be contacted. Likewise, a user may have disabled the RPC server or specifically prevented remote clients from contacting it. How to Fix RPC Server In order to fix an RPC server, the user must identify the problem that is causing the RPC server to be unavailable in the first place. The user should check all network cables, restart all network devices, and, if possible, manually check the RPC server for malfunctions and accessibility restrictions.

RPC implements a series of tasks in order to establish communication between a client and a server. First, the client initiates a specific objective by contacting a local process known as a “client stub” with parameters for accessing a file or service. The client stub converts the parameters it receives from the client into appropriate parameters on the server. The client stub then sends these new parameters to the operating system’s kernel, which then sends the message to the server stub (same as client stub, but is located on the server machine). The server stub decodes the message and sends it to the appropriate application or service. Once the application has been contacted, replies may be sent in the reverse direction through each of these processes.

An MPLS (Multi-Protocol Label Switching) network is one in which many devices are connected to each other through a master system that receives data from each individual device and relays it to any other device within the network. MPLS networks differ from traditional networks because they connect a large number of devices across long distances by tunneling through the Internet. How MPLS Networks Work An MPLS network is a cloud-like system of computers and other devices that all communicate with each other by assigning labels to data packets so that they can be forwarded from one device to another. For example, if Device A wishes to send a data packet to Device E, Device A will insert a header in the data packet with a label stack that contains information about the data packet, where it came from, and where it is going. Device A will then send the data packet to Device B, Device B will send the data packet to Device C, Device C will send the data packet to Device D, and Device D

A VPLS (Virtual Private LAN Service) is a network protocol that allows users to connect many different ethernet-based local area networks together over long distances. VPLS uses MPLS data packets and the Internet in order to forward information from one or more computers in one network to one or more computers in another network and then expand that to include even further networks that are all connected via the VPLS. Businesses and government agencies that have branches in many different locations generally use VPLS systems. However VPLS systems can also be used for gaming and other purposes that require networks to send and receive data outside of each network’s physical operation range. How VPLS Works VPLS networks work in similar to both LAN and MPLS networks. In a VPLS system, data is arranged in packets and labeled according to what it is, where it came from, and where it is going. Each packet is then sent to the nearest computer within the network in alphabetical order. As

The Hot Standby Router Prtocol (HSRP) is a networking protocol that supports the non-disruptive failover of Internet Protocol (IP) traffic in special circumstances. HSRP also allows network hosts to look like they are using a single router and keep connected if the first hop router being used fails to respond. The protocol guards against the failure of the first hop router in a network infrastructure when the router’s IP address cannot be found dynamically. The HSRP normally joins several routers together to create a single virtual server that client machines and networks use. The protocol helps to ensure that only one of the virtual server’s routers is working at any given time. How does the Hot Standby Router Protocol Work? The router that forwards packets for the virtual router is referred to as the active router. There is also a designated standby router in the scheme in the event that the primary router fails. The protocol makes router assignments based on the IP address assi

A VPN (Virtual Private Network) server is one that is connected to a Virtual Private Network in order to allow remote users to access files on the server. Companies, government agencies, and various institutions use VPN servers in order to provide users who are away from the server with consistent access to important files and software. Likewise, VPN servers are used domestically to ensure that users have access to computer files while they are away from their home or office. How VPN Servers Work A VPN server is simply one that is connected to a Virtual Private Network. A Virtual Private Network (VPN) channels through the Internet in order to connect a multitude of users, servers, and devices together. VPNs can also include other networks, such as local area networks, and are encrypted to ensure that only users who have the proper authorization can access them. VPN networks are dependent on both a server and client. The server hosts the main files and the client is all other devic

The Simple Network Time Protocol (SNTP) is a simpler version of the Network Time Protocol (NTP). SNTP synchronizes the time between networked computer systems and is relied on when data is being transferred via the Internet. The NTP protocol is one of the most established protocols still used on the Internet. It uses a GPS or radio clock to tell time and is accurate past the seconds place. Why is the SNTP Necessary? The need for precise time synchronization has continued to increase with the evolution of computer technology over the past several decades. In the networking field, network servers and their client computers require precision to the millisecond and beyond in order to ensure data file transfers occur without errors. Computers also require specific time synchronization in order to ensure data packet and email delivery in the proper sequence to destination networks and email recipients. The importance of the SNTP and NTP protocols exponentially expands with the number of

What is Group Policy Group Policy is an Active Directory feature that provides the means for you to effectively and efficiently manage large numbers of computers. You can manage both user and computer configuration settings centrally, from one position of administration. You can define group policies as being a collection of user and computer configuration settings which you can link to the following components: Computers Sites Domains Organizational Units (OUs) Once linked, Group Policy defines the manner in which the operating system, network resources, and applications and programs operate for users within the organization. In other words, group policies define the behaviour of the desktops of users. You can use Group Policy for the following administrative operations: Through group policies, you can define and configure scripts that run at: Computer startup Computer shutdown User logon User logoff To change Registry settings To deploy and manage programs and applications