CIS 505 Week 7 Discussions STR
CIS 505 Week 7 Discussion 1
The Advantages of VPNs for an organization include cost savings and network scalability. A VPN can save organizations money in several situations: eliminating the need for expensive long-distance leased lines, reducing long-distance telephone charges, & offloading support costs. The cost to an organization of building a dedicated private network may be reasonable at first but increases exponentially as the organization grows. Internet based VPNs avoid this scalability problem by simply tapping into the public lines and network capability readily available& offers superior reach and quality of service.
From the e-Activity, compare three VPN services available to organizations to determine the primary differences among each. Discuss the pros and cons of each VPN service and suggest the type of organization that would best fit each network provider.
PPTP VPN – This is the most common and widely used VPN protocol. They enable authorized remote users to connect to the VPN network using their existing Internet connection and then log on to the VPN using password authentication. They don’t need extra hardware and the features are often available as inexpensive add-on software. PPTP stands for Point-to-Point Tunneling Protocol. The disadvantage of PPTP is that it does not provide encryption and it relies on the PPP (Point-to-Point Protocol) to implement security measures.
SSL – SSL or Secure Socket Layer is a VPN accessible via https over web browser. SSL creates a secure session from your PC browser to the application server you’re accessing. The major advantage of SSL is that it doesn’t need any software installed because it uses the web browser as the client application. A disadvantages is its optional (as opposed to in-built) user authentication. This is a major security weakness. Also, SSL tunneling (basically mimics IPSec) is not supported on Linux or non-Windows OS.
MPLS VPN – MPLS (Multi-Protocol Label Switching) are no good for remote access for individual users, but for site-to-site connectivity, they’re the most flexible and scalable option. These systems are essentially ISP-tuned VPNs, where two or more sites are connected to form a VPN using the same ISP. An MPLS network isn’t as easy to set up or add to as the others, and hence bound to be more expensive.
For individual users, PP2P VPNs offer the best deal, but for large offices or ones with complex requirements for connectivity MPLS VPNs might be the best option.
CIS 505 Week 7 Discussion 2
Frame relay is a packet switching technology for connecting network points in Wide Area Networks (WAN). It is a connection oriented data service and establishes a virtual circuit between two end points. Data transfer is done in packets of data known as frames. These frames are variable in packet size and more efficient due to flexible transfers. Frame Relay was originally introduced for ISDN interfaces though it is currently used over a variety of other network interfaces as well.
ATM is a network switching technology that uses a cell based methodology to quantize data. ATM data communication consists of fixed size cells of 53 bytes. An ATM cell contains a 5byte header and 48 bytes of ATM payload. This smaller size, fixed-length cells are good for transmitting voice, image and video data as the delay is minimized. ATM is a connection oriented protocol and therefore a virtual circuit should be established between sending and receiving points. It establishes a fixed route between two points when the data transfer starts. Another important aspect of ATM is its asynchronous operation in time division multiplexing. ATM provides a good quality of service in networks where different types of information such as data, voice, and are supported. With ATM, each of these information types can pass through a single network connection.
Advantages & Disadvantages
Although ATM uses fixed size packets (53 bytes) for data communication, frame relay uses variable packet sizes depending on the type of information to be sent. Both information blocks have a header in addition to data block and transfer is connection oriented. Frame Relay is used to connect Local Area Networks (LAN) and it is not implemented within a single area network contrast to ATM where data transfers are within a single LAN. ATM is designed to be convenient for hardware implementation and therefore, cost is higher compared to frame relay, which is software controlled. Therefore, frame relay is less expensive and upgrading is easier. Frame relay has a variable packet size. Therefore, it gives low overhead within the packet which results it an efficient method for transmitting data. Although fixed packet size in ATM, can be useful for handling video and image traffic at high speeds, it leaves a lot of overhead within the packet, particularly in short transactions.
Suppose you are in charge of selecting ATM or frame relay as a WAN alternative for your technological needs of a communication technology organization. Choose one of the WAN alternatives and justify your decision.
A WAN alternative I would choose for my technological needs of a communication technology organization would be Frame Relay. Frame Relay networking services deliver a permanent virtual circuit (PVC), which means that customers benefit from what looks like a continuous, dedicated connection, without having to pay for a full-time leased line. At a service provider level, the route which each frame travels to its destination is allocated dynamically and can be charged based on actual usage. It’s a proven technology, resilient, is more cost effective than leased lines, and is more scalable than a network of private circuits.
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CIS 505 Week 7 Discussions STR
ACCT 553 DeVry, BIAM 500 DeVry, CIS 500 STR, CIS 558 STR, ENG 105 GCU, FIN 390 DeVry, FIN 504 GCU, HCA 545 GCU, HCA 699 GCU, HLT 306 GCU, HLT 362 GCU, HLT 555 GCU, HLT 610 GCU, HLT 665 GCU, HOSP 594 DeVry, HRM 600 DeVry, MAT 144 GCU, MGMT 600, MGT 599 STR, MGT 655 GCU, MKT 373 GCU, PSY 362 GCU, PSY 565 GCU, PSY 575 GCU, PSY 665 GCU, SOC 102 GCU, SOC 320 GCU, SOC 372 GCU, SOC 412 GCU, NSG 6440 SU, HIM 515 GCU, NSG 4029 SU, HIM 615 GCU, NSG 3029 SU, NSG 4055 SU, NSG 6630 SU, NSG 6005 SU, CRMJ 310, PSY 510 GCU, CRMJ 300 Devry, CRMJ 425, SPD 200 GCU, HLT 490 GCU ,ECH 340 GCU, ECH 440 GCU, ECH 355 GCU, ECH 350 GCU, LDR 461 GCU, ECH 425 GCU, REL 212 STR, ,SCI 115 STR ,CIS 505 STR
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