Differences between a VPN Router and a VPN Server - Assignment Example

Network Management - Quiz 9 Differences between a VPN Router and a VPN Server Certain differences are apparent between a VPN router and a VPN server. These differences are notable relating to the case of Cisco VPN concentrator. In this regard, it is eminent that VPN router supports the devices like computers, smart phones, tablets and others to VPN service. Cisco VPN router requires to install VPN clients on each of the above stated devices. Although a VPN router provides security for business communication, it also supports in providing added security to multidimensional nodes along with networks. Specially mentioning, VPN server of Cisco provides added security and encrypted networks. This is supportive when devices are of distant locations possessing varied IP addresses. Furthermore, VPN server provides cost benefits to the organisations operating in the technology sector (Senft, Gallegos & Davis, 2012; Ray & Acharya, 2004). 2. Explanation of the Remote Access VPN Scenario 2.1 Contained in the Destination IP Field of the Packet’s Header It is to be affirmed that when the message leaves program X in the form of a packet, the Destination IP field of the packet’s header contained 14 IP fields. In this regard, 13 fields are required to be considered and the 14th field is optional (Senft et al., 2012; Ray & Acharya, 2004). 2.2 Contained in the Destination Port Field of the Packet’s Header When the message leaves program X in the form of a packet, it is worth mentioning that the Destination Port field of the packet’s header comprises destination IP address. It must be mentioned that the packet’s header does not contain any destination name (Senft et. al., 2012; Ray & Acharya, 2004). 2.3 Determination of the Payload of the Packet is Encrypted or Not Based on the provided scenario, it can be affirmed that when the message leaves program X in the form of a packet, the payload of the packet is not encrypted. This might be owing to the reason that the server program of Y executed on the application server is deemed to be a readable one (Senft et. al., 2012; Ray & Acharya, 2004). 2.4 Determination of the Program Z With regards to the provided scenario, the program Z could be reckoned as Message Transfer Agent. Message Transfer Agent is a type of software, which transfers electronic messages from one particular device to others (Senft et. al., 2012; Ray & Acharya, 2004). 2.5 Action of Program Z against the Packet After the Message Transfer Agent i.e. Z gets the packet, it will work upon the message transfer process for ensuring that the messages are transmitted from one specific user to others (Senft et. al., 2012; Ray & Acharya, 2004). 2.6 Explanation of Info W In the process of message transfer from X to Y, the Message Transfer Agent i.e. Z needs to let the VPN server TO authenticate Alice. In this regard, it is essential that Z must require sending information to Administrative Management Domain (ADMD). ADMD is denoted as Z in the current context. It must be mentioned that ADMD is a vast public telecommunication message carrier. The primary role of this tool is to authenticate sender’s message (Senft et. al., 2012; Ray & Acharya, 2004). 2.7 Description of the Name of Server T In the current scenario, after the VPN server receives info W, the VPN server will forward W to another server T. This T is known as Domain Name System (DNS). DNS is a form of naming system based on distributed hierarchy of computers, services or other form of resources connected with private network or internet (Senft et. al., 2012; Ray & Acharya, 2004). 2.8 Contained in the Destination IP Field of the Packet’s Header After the VPN server obtains a positive reply from server T, it will communicate to program Z about Alice to be a legitimate employee. It is important to note that the program Z sends the message to the VPN server. However, when the message leaves program Z, the Destination IP field of the packet’s header contains variable number of options with specifying headers’ size. It is worth mentioning that the minimum value for the current field is 5. This suggests of 160 bits equivalent to 20 bytes (Senft et. al., 2012; Ray & Acharya, 2004). 2.9 Contained in the Payload of the Packet When the message leaves program Z, the payload of the packet contains overhead, which requires getting the packet for its destination. This is necessary for the communications layers that require certain portion of overhead data for sending the message (Senft et. al., 2012; Ray & Acharya, 2004). 2.10 Handling of the Packet by the VPN Server There are certain steps through which VPN server can handle the packet. In this regard, the primary step is to initiate setup for VPN server. This server is required to get connected with every device. The subsequent step of the process is the installation of router and access remote service. The other step is remote authentication as well as forwarding different options. The next step in the process is the configuration of remote access of network policies. The last step is the enabling of NAT, which is optional (Senft et. al., 2012; Ray & Acharya, 2004). 2.11 Reason for Not Forwarding Message to Server T by the VPN Server The VPN server does not want to forward message to server T. This might be owing to the reason that it may lead towards the possibility of accessing protected information or resources of the organisations or the users. This eventually creates a significant loss to the users. Thus, VPN server does not want to forward message to T (Senft et. al., 2012; Ray & Acharya, 2004). 2.12 Contained in the Source IP Field of the Packet When the message leaves the VPN server, the Source IP field of the packet contains a specified IP address, which tends to carry the routing of the packet (Senft et. al., 2012; Ray & Acharya, 2004). 2.13 Number of Times of the Message Been Encrypted During the whole process of message transfer, there are only two times when the message has been encrypted. The reason behind such is the protection and security of the same (Senft et. al., 2012; Ray & Acharya, 2004). 2.14 Number of Times of the Message Been Decrypted In the course of message transfer, there are two times when the message has been decrypted. This is also because ensuring greater protection of the message from the senders to the receivers (Senft et. al., 2012; Ray & Acharya, 2004). References Ray, A. K., & Acharya, T. (2004). Information technology: Principles and applications. New Delhi: PHI Learning Pvt. Ltd. Senft, S., Gallegos, F., & Davis, A. (2012). Information technology control and audit, fourth edition. The United States: CRC Press. Read More