CIS 505 Week 5 Discussions STR

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CIS 505 Week 5 Discussions STR

CIS 505 Week 5 Discussion 1

Routing and Switching Selection Criteria. Please respond to the following:

Compare distance-vector and link state routing and analyze the limitations that would prevent the usage of each.

Distance vector routing protocols are designed to run on small networks (usually fewer than 100 routers). Examples of distance vector routing protocols include RIP and IGRP. Distance vector protocols are generally easier to configure and require less maintenance than link-state protocols. On the downside, distance vector protocols do not scale well because they require higher CPU and bandwidth utilization. They also take longer to converge than do link-state protocols. Distance vector protocols always choose the route with the fewest number of hops as the best route. This can be a problem when the best route to a destination is not the route with the least number of hops.

Link state routing protocols are designed to operate in large, enterprise-level networks. Examples of link state protocols include OSPF and NLSP. Link state routing protocols are very complex and are much more difficult to configure, maintain, and troubleshoot than distance vector routing protocols. Additionally, link state convergence occurs faster than distance vector convergence. This is because link state establishes a neighbor relationship with directly connected peers and shares routing information with its neighbors only when there are changes in the network topology. Link state routing protocols can be difficult to configure and maintain.

http://www.techrepublic.com/article/should-you-use-distance-vector-or-link-state-routing-protocols/

Choose the method best suited for designing a new routing protocol for a LAN architecture. Justify your decision.

The best method for designing a new routing protocol for a LAN is employ two or three tiers of LANs. Within a department, a low-cost, moderate speed LAN supports a cluster of personal computers and workstations. These departmental LANs are lashed together with a backbone LAN of higher capacity. The architecture of a LAN is best described in terms of a layering of protocols that organize the basic functions of a LAN.

CIS 505 Week 5 Discussion 2

Suggest a way to improve the way LLC and MAC are used for LAN operation.

The MAC layer is responsible for detecting errors and discarding any frames that contain errors. The LLC layer optionally keeps track of which frames have been successfully received and retransmits unsuccessful frames. The relationship between LLC and the MAC protocol can be seen by considering the transmission formats involved. User data are passed down to the LLC layer, which prepares a link-level frame, known as an LLC protocol data unit (PDU). This PDU is then passed down to the MAC layer where it is enclosed in a MAC frame. In a wireless environment, data packets may be lost entirely, partially lost due to truncation, or corrupted by bit errors. However, adaptive packet shrinking and forward error correction (FEC) policies significantly increase the useful throughput of a wireless LAN, while the fixed policies are effective only in some environments & can be added fairly easily to the MAC and LLC implementations.

Stallings, William. (10/2008). Business Data Communications, 6th Edition. [VitalSource Bookshelf Online]. Retrieved from https://strayer.vitalsource.com/#/books/9781323079324/

Eckhardt, D. A., & Steenkiste, P. (1998, October). Improving Wireless LAN Performance via Adaptive Local Error Control. Retrieved from http://repository.cmu.edu/cgi/viewcontent.cgi?article=1526&context=compsci

Evaluate guided and unguided transmission medium to determine which you would use to design a new facility.

Transmission media can be classified as a guided or unguided. With guided media, the waves are guided along a solid medium, such as copper twisted pair, copper coaxial cable, or optical fiber. The atmosphere and outer space are examples of unguided media, which provide a means of transmitting electromagnetic signals but do not guide them; this form of transmission is usually referred to as wireless transmission. For a new facility I would initially go with guided transmission media and then add unguided transmission media. Guided transmission capacity depends on the distance and on whether the medium is point-to-point or multipoint. Unguided transmission and reception are achieved by means of an antenna, is directional & puts out focused beam. However, the transmitter and receiver must be aligned but can spread signals out in all directions & can also be received by many antennas.

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CIS 505 Week 5 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