The brief You are a consultant, and your client is a "start-up" that is developing products for use in the agricultural sector. They presently have an sales office in the Parramatta Central Business District (CBD), a small site office located in the regional city of Bathurst, and a Data Center and Call Centre located in Ultimo. They plan to shortly open three more offices located in the other regional cities of Armidale, Cooma, and Dubbo. Each of these offices will have an identical structure to the Bathurst office. A diagram showing the network topology of your client's network is shown in Appendix A, with MAC addresses for each device provided in the table that follows in Appendix B Question 1 (20 marks) — Subnetting - a. [5 marks— 1/2 page] How can you tell from the diagram below how many subnets you'd need to create? b. [10 marks 1 to 2 pages] Your service provider has given you the 192.168.221.0/24 network. Devise a Fixed Length Subnetting (FLSM) scheme to accommodate all the networks in the diagram (and only those in the diagram). Remember each network needs it's own IP address range (subnet) and Routers are the devices that connect different networks, and hence have a different address, one for each network that Router is connected to. Please ensure that you document each step of this process. Each subnet should include the network address, the maximum number of hosts supported by the network, and о the broadcast address, о о c. [5 marks the netmask in dottted-decimal notation. to 1 page] Will your subnetting scheme be able to accommodate the planned new offices in Armidale, Cooma, and Dubbo? о If yes, also include these offices in your subnetting scheme о If no, provide a brief explanation of what changes could be made to deal with these planned extra networks. Question 2 (20 marks) — Encapsulation and network traversal a. [10 marks 1 to 2 pages] A user logged into PC1 in the Bathurst office on PC1 opens a command prompt and uses the ping command to test connectivity to Printer2 located at the Paramatta CBD site. You should assume that the options given to the ping command ensure that only a single packet is sent. Explain what traffic this command will create, both directly and indirectly, and how this traffic will affect the ARP caches and/or MAC tables within each device. In your answer, you should assume that the ARP caches and MAC tables in each device are empty before the ping command is run. For example, if you had a HTTP request originating from HostA with MAC address 46:2D:C0:93:42:AD, and IP address 172.16.3.2, and destined to HostB with MAC address 97:22:51:67:B5:88 and IP address 172.16.3.5, then you could notate the packet as it leaves HostA as follows (note that we don't know enough detail about Layer 5 to say anything other than "HTTP request"): [Ethernet SRC: 46:2D:C0:93:42:AD, DST: 97:22:51:67:B5:88 [IP SRC: 172.16.3.2, DST: 172.16.3.5 [TCP SRC: 49238, DST: 80 [HTTP request]]] b. [10 marks 12 to 1 page] There are two possible paths that this traffic could take, via WAN1 or via WAN2. Provide a brief explanation of which path will be taken and why. Question 3 (20 marks) — Data-Link Layer a. [2 marks ~1/2 page] Some of the switches are marked as "managed", whereas some are marked as "unmanaged". Briefly describe the difference between these two kinds of switches. b. [3 marks ~ page] What impact does the use of managed or unmanaged switches have on addressing within the network? c. [2 marks ~1/2 page] Who is the manufacturer of Switch 12 in the Call Center network? How can you tell? d. [3 marks ~1/2 page] The uplink interface of switch 12 (the link from Switch12 to Router8) seems to be made by a different company, why might this be? e. [5 marks ~1/2 page] List the broadcast domains and describe which devices are in each broadcast domain - create a table one row per broadcast domain with each row listing all the devices in that broadcast domain. f. [5 marks ~1/2 page] List the collision domains and describe which devices are in each collision domain - create a table one row per collision domain with each row listing all the devices in that collision domain. Appendix A - Network Topology Note: The Call Center switch is "Switch 12". Call Center PC's are attached to their associated port number (eg. Call07 is connected to Port Fa0/7, Call04 is connected to Port Fa0/4, etc.) Bathurst Parramatta CBD Gig1 Fao Co Server Server2 Gig0/2 Fa0 Fa0/1 Fa0/3 Fa0/7 Fa0 Printer20 Fa0/1 Fa0/3 Switch3 Gigo/2 Door Card Reader Fa0/6 Fa1/0 Switch1 Fa4/0 Roter6 Fa6/0 Gig7/0 WAN 1 Fa4/0 Fa2/0 Router2 Router4 Fa0 PC2 Fa0/2 Fa5/0 Fa20 WAN 2 Gig6/0 Gig0/1 Gig5/0 Gig3/0 Routers Gig7/0 Gig3/0 Gig5/0 Fa0/1 witch5 Router1 -6g10 Gig5/0 Gig8/0 Fa5 PC3 Fa0 Fa Fa IP Phone3 Fat Fa P Fab Hub1 IP Phone Fa0 Ultimo DC Fa0 PC1 Server11 Router3 Router7 Fa0 Fa0 Fa0 Gig5/0 Fa0/11 Fa0/8 Gig6/0 Router Fa7/0 Fa0 Fa0/10 Fa0/1 Fa0/12 wh Fa0/23 Server 10 Fa0/7 Fa0/13 FanR Fa0 Fa0 Sw Fa09 Fa0/10 Fab Fa0 Server12 Call Center Call10 Server13 Appendix B - Device MAC addresses Location Bathurst Device Interface MAC Address PC3 Fa0 00:00:A4:C9:0A:CF IP Phone3 E0:26:36:71:58:05 PC E8:05:6D: 6F:E3:94 Sw E8:05:6D: 92:09:CD PC1 Fa0 00:80:10:5B:48:26 IP Phonel 10:CD: AE:F6:82:61 PC 24:D9:21:A9:F9:36 Sw 24:D9:21: D1: D2:D5 Hubl Fa0 Fa5 PC2 Fa0 Switch5 (unmanaged) 00:00:36:45:A6:7A 74:44:01:09:08:1C Fa0/1 Fa0/2 84: 1B:5E: 3B:BA: 0A 84 1B:5E:42:36:8E Gig0/1 9C: D3:6D: D3:6D: 0D Router1 Fa2/0 00:04:5A: 07:5B:C0 Gig3/0 00:06:25:1F:4B:79 Gig5/0 00:06:25:60:A4:F3 Parramatta Router6 Fa1/0 20 AA:4B:36:0D:33 CBD Switch1 (managed) Fa4/0 Gig7/0 20: AA: 4B:6D:B9:5C 98 FC: 11:23:D2:79 00:25:61:17:FE:7F Fa0/1 B4:39:D6:D6:EB:AB Fa0/3 B4:39:D6:86:31:B1 Fa0/6 B4:39:D6:AA:80:A4 Gig0/2 C0:91:34:19:49:93 Switch3 (managed) 00:25:61:F9:98:3C Fa0/1 B4:39 D6:4A:08:FF Gig0/2 CO:91:34:3B:9B:E9 Server1 Server2 Printer2 Fa0 Gig1 Ethernet0 F8 DB: 88:56:22:F4 00:01 FE:ED:CC:B8 00:00:0F: 03:2B:42 PCO IoT7 Fa0 F8: 0D:60:F7:AE:39 Fa0 FC D4 F2:5D:C4:30 WAN 1 Router2 Fa4/0 00: E0:8F:E5:71:8E Fa5/0 00: E0:8F:01:80:C6 Router4 Fa2/0 FO: 9E: 63:28:FB:6A Fa6/0 FO:9E:63: EF: 0C: FE WAN 2 Router3 |Gig1/0 64 E9:50 FF:E7:2C Gig5/0 64 E9:50:67:B9:40 Router5 Gig3/0 CC: E1:7F:E5:DD:80 Gig8/0 CC: E1:7F:E5:DD:80 Gig7/0 CC: E1:7F:E5:DD:80 Router7 Gig5/0 3C:00:00:0D:03:D4 Gig6/0 3C:00:00:33:AF:24 Ultimo DC Router8 Fa7/0 EC:C8:82:18:D9:A0 Gig5/0 F0 B2 E5:79:EF:B5 Gig6/0 F0 B2 E5:78:D6:DB Switch6 48:6E:73:37:9C:9A (managed) Fa0/8 48:6E:73:99:76:8F Fa0/10 48:6E:73:71:95:4F Fa0/11 48:6E:73:83:40:50 Fa0/12 48:6E:73:40:E3:9A Fa0/13 48:6E:73:25:59:3E Fa0/14 48:6E:73:73:04:64 Fa0/15 48:6E:73:0B:6A:6C Server10 Fa0 D4:81: D7:52:28:06 Server11 Fa0 D4:81: D7:CA:4A:E5 Server12 Fa0 D4:81: D7 CA: 4A:E5 Server13 Fa0 D4:81: D7:98:79:48 Switch12 (unmanaged) 5C:16:C7:54:4A:2B Fa0/1 5C:16:C7:B4:5C:01 Fa0/2 5C:16:C7:B4:5C:02 Fa0/3 5C:16:C7:B4:5C:03 Fa0/4 5C:16:C7:B4:5C:04 Fa0/5 5C:16:C7:B4:5C:05 Fa0/6 5C:16:C7:B4:5C:06 Fa0/7 5C:16:C7:B4:5C:07 Fa0/8 5C:16:C7:B4:5C:08 Call09 Jall07 Fa0 Салов Fa0/9 5C:16:C7:B4:5C:09 Fa0/10 5C:16:C7:B4:5C:0a Fa0/11 5C:16:C7:B4:5C:0b Fa0/12 5C:16:C7:B4:5C:0c Fa0/13 5C:16:C7:B4:5C:0d Fa0/14 5C:16:C7:B4:5C:0e Fa0/15 5C:16:C7:B4:5C:0f Fa0/16 5C:16:C7:B4:5C:10 Fa0/17 5C:16:C7:B4:5C:11 Fa0/18 5C:16:C7:B4:5C:12 Fa0/19 5C:16:C7:B4:5C:13 Fa0/20 5C:16:C7:B4:5C:14 Fa0/23 00:90:65:B4:5C:15 Call01 Fa0 A8: FA:D8:30:F2: DE Call02 Fa0 A8: FA:D8:50:D9:A9 Call03 Fa0 A8: FA:D8:E9:73:1E Call04 Fa0 A8: FA:D8:FE:33:8B Call05 Fa0 A8: FA:D8:C1:1F:0A Call06 Fa0 A8: FA:D8:65:BE:C1 Call07 Fa0 Call08 Fa0 Call09 Fa0 Call10 Fa0 A8 FA:D8:5A:B2:BE A8: FA:D8:97:B6:12 A8: FA: D8:1F:3C:52 A8: FA:D8:EF:B4:7B Edit: updated Q2 to make clear that the caches and tables being referred to where layer- 2, ie. arp caches and mac tables. Edit2: updated the table in Appendix B to have the correct locations. ie. swapped Parramatta and Bathurst.