Assignment Academic Essay - Write My Academic Essay

Q1:
Instructions
Questions are worth 2 marks each. Submit as a single PDF document.

1. You have been asked to set up a TCP/IP-based network that supports a maximum of 2046 nodes.
1. Define an appropriate subnet mask to support such a network. The mask must provide for the maximum number of network identifiers while still supporting 2046 nodes. Express your answer in dotted decimal notation.
2. Given that the network ID is 10.17.28.0, provide the physical network identity in CIDR notation.
3. Calculate the full IP address of node 1025 in this network.
2. The IP address of my computer is 192.168.3.193. If my computer is node 65 of my physical network,
1. What is the network identity of my network?
2. What is the subnet mask for my network?
3. What is the broadcast address for my network?
3. A given IPv4 datagram includes a single 8-bit option and 3 data bytes. What are the values of the following fields in the IP header?
1. IHL
2. Total length
4. Given a network described by the following routers and link weights, show step-by-step how the routing tables for each router would be generated using distance vector routing (assume router A first broadcasts its routing table, then router B, continuing in alphabetical order before starting back at A). How many rounds of broadcasting the routing tables are required before each router’s table is optimal?
o (A, B, 4), (A, D, 2), (B, D, 5), (C, D, 1), (C, E, 7)
5. The following is an email sent from my UNE email address to myself.
0. Describe the purpose and value of each header.
1. In as much detail as possible, using only the below message, describe the systems the email passed through on its way to my inbox.

Received: from exch-mbx02.ad.une.edu.au (129.180.6.73) by
exch-mbx03.ad.une.edu.au (129.180.6.74) with Microsoft SMTP Server (TLS) id
15.0.1104.5 via Mailbox Transport; Thu, 14 Jan 2016 10:43:43 +1100
Received: from exch-cas01.ad.une.edu.au (129.180.6.64) by
exch-mbx02.ad.une.edu.au (129.180.6.73) with Microsoft SMTP Server (TLS) id
15.0.1104.5; Thu, 14 Jan 2016 10:43:42 +1100
Received: from smtp-hub.une.edu.au (129.180.6.225) by exch-cas01.ad.une.edu.au
(129.180.6.64) with Microsoft SMTP Server id 15.0.1104.5 via Frontend
Transport; Thu, 14 Jan 2016 10:43:43 +1100
Received: from mail.une.edu.au (lilith.une.edu.au [129.180.3.90])
by smtp-hub.une.edu.au (Postfix) with ESMTP id B30A080002
for <[email protected]>; Thu, 14 Jan 2016 10:43:42 +1100 (AEDT)
Received: by mail.une.edu.au (Postfix)
id A16BF18003; Thu, 14 Jan 2016 10:43:42 +1100 (EST)
Delivered-To: [email protected]
Received: from smtp-hub.une.edu.au (f5-snat-pool-1.une.edu.au [129.180.1.245])
by mail.une.edu.au (Postfix) with ESMTP id 9E3C218002
for <[email protected]>; Thu, 14 Jan 2016 10:43:42 +1100 (EST)
Received: from exch-mbx02.ad.une.edu.au (exch-mbx02.une.edu.au [129.180.6.73])
by smtp-hub.une.edu.au (Postfix) with ESMTP id A106880004
for <[email protected]>; Thu, 14 Jan 2016 10:43:42 +1100 (AEDT)
X-CrossPremisesHeadersFilteredBySendConnector: exch-mbx02.ad.une.edu.au
Received: from exch-mbx03.ad.une.edu.au (129.180.6.74) by
exch-mbx02.ad.une.edu.au (129.180.6.73) with Microsoft SMTP Server (TLS) id
15.0.1104.5; Thu, 14 Jan 2016 10:43:42 +1100
Received: from exch-mbx03.ad.une.edu.au ([fe80::d089:61ca:cce0:14e6]) by
exch-mbx03.ad.une.edu.au ([fe80::d089:61ca:cce0:14e6%14]) with mapi id
15.00.1104.000; Thu, 14 Jan 2016 10:43:42 +1100
From: David Paul <[email protected]>
To: “[email protected]” <[email protected]>
Subject: COSC540 Email
Thread-Topic: COSC540 Email
Thread-Index: AQHRTlw7uKei2wbeak2iD7an6BH4jQ==
Date: Wed, 13 Jan 2016 23:43:41 +0000
Message-ID: <[email protected]>
Accept-Language: en-AU, en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-ms-exchange-messagesentrepresentingtype: 1
x-ms-exchange-transport-fromentityheader: Hosted
x-originating-ip: [129.180.6.225]
Content-Type: text/plain; charset=”utf-8″
Content-ID: <[email protected]>
Content-Transfer-Encoding: base64
X-OrganizationHeadersPreserved: exch-mbx02.ad.une.edu.au
Return-Path: [email protected]
X-MS-Exchange-Organization-Network-Message-Id: 88a3a322-ce30-4dd9-b974-08d31c735ed7
X-MS-Exchange-Organization-AVStamp-Enterprise: 1.0
X-MS-Exchange-Organization-AuthSource: exch-cas01.ad.une.edu.au
X-MS-Exchange-Organization-AuthAs: Anonymous
MIME-Version: 1.0

SSBob3BlIHRoaXMgbWVzc2FnZSBtYWtlcyBpdCB0aHJvdWdoIC0gaXTigJlzIGdvdCBxdWl0ZSBh
IGpvdXJuZXkgdG8gdGFrZSE=
Q2

Questions are worth 2 marks each. Submit as a single PDF document.

1. A modem uses QPSK (Quadrature Phase-Shift Keying – i.e. there are four possible phase-shifts) on a 2000Hz PSTN (Public Switched Telephone Network).
1. Calculate the Nyquist maximum data transfer rate if only two phase-shifts were possible.
2. Deduce the Nyquist maximum data transfer rate.
3. Assume the channel has a 4dB signal-to-noise ratio. Calculate the Shannon-Hartley maximum data transfer rate for this channel.
4. Compare the results obtained in parts 1), 2), and 3). What does the difference between 1) and 2) tell us? How does 3) limit any benefits the other results may give?
2. Draw the waveform that would be used to send the following bits over RS-232-C with 1 start bit, 8 data bits, 1 stop bit, and no parity bits:
1. 00000000
2. 11111111
3. 11110000
4. 10011100
3. A bit stream 10011101 is transmitted using a standard CRC calculated using the generator polynomial x3 + x + 1.
1. Find the actual transmitted bitstream.
2. Assume your answer for part 1) is received with the second bit from the left inverted (i.e. 0 is received as 1 or 1 is received as 0). Show how the receiver would detect this error.
4. Consider the network consisting of 4 routers and link weights described by (A, B, 4), (A, D, 2), (B, D, 8), (C, D, 1).
1. Draw the network.
2. Produce the routing table for each router.
5. Consider the network consisting of 8 routers and link weights described by (A, C, 1), (A, E, 7), (A, F, 9), (B, F, 1), (B, G, 4), (C, G, 5), (C, H, 9), (D, E, 10), (D, H, 9), (F, H, 6).
1. Draw the network.
2. Produce the routing table for each router.