Final Exam Started: Aug 13 at 9:33pm Quiz Instructions This final exam has multiple choice, short answer, fill in the blanks and numerical problem questions worth a total of 101 points. Students will not always receive the same questions. Students will see the answers to the same question in different orders. You have 180 minutes. […]
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Slide 1 1 Networking DNS © Janice Regan, 2006-2013 © Janice Regan, 2006-2013 2 DNS The primary use of DNS is to answer queries requesting the IP address that corresponds to a given host name. © Janice Regan, 2006-2013 3 Operation of a DNS server A DNS name server is initialized, knowing the addresses of
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Slide 1 1 Networking DNS © Janice Regan, 2006-2017 © Janice Regan, 2006-2017 2 Database / authoritative servers When a authoritative master or slave DNS server is initialized it loads a configuration file which associates domain names with data files containing DNS resource records for that domain For linux systems that file is usually /etc/named.conf,
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Slide 1 1 CMPT 471 Networking II Multicasting protocols © Janice Regan, 2006-2017 © Janice Regan, 2006-2017 2 State machine for an entry in host’s multicast route table Comer 2000: fig 17.4 © Janice Regan, 2006-2017 3 IGMP states: 1 Consider a router with at least one host on a connected network that is a
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Slide 1 1 Networking DHCP © Janice Regan, 2006-2013 © Janice Regan, 2006-2013 2 Bootstrapping Autoconfiguration Bootstrapping is a process by which a client (diskless or with limited storage) can obtain information ranging from IP addresses to bootloading files (from a server or servers) Bootstrapping uses this information to load OS into volatile storage and
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Slide 1 1 CMPT 471 Networking II ICMPv6 © Janice Regan, 2012-2018 Calculating the checksum For ICMP the ICMP header and message are considered when the checksum is calculated Break the data described above into 16 bit blocks. Consider each of the blocks as an integer. (checksum field should be 0) Calculate the ones complement
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Slide 1 1 Networking IPsec © Janice Regan, 2009-2017 © Janice Regan, 2009-2017 2 Necessary components Both authentication and encryption are based on algorithms that require the end users to process the contents of the packets using a key known only to the sender and/or the receiver This means that a third party, who does
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Microsoft Word – assignment2key.docx CMPT 471 Assignment 2 SOLUTION 1) Explain how you would set up a simple laboratory experiment to capture and display in Wireshark each of the following ICMPv6 messages. a) [10 points] IPv6 destination unreachable/address unreachable: b) [10 points] IPv6 router solicitation and the resulting router announcement/s followed by periodic router announcements
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Slide 1 1 CMPT 471 Networking OSPF © Janice Regan, 2006-2017 © Janice Regan, 2006-2017 2 Dynamic Routing In very simple small networks static routing may be adequate. As networks grow and become more complex, including multiple or redundant paths between hosts and routers static routing becomes difficult to manage Redundant routes are only useful
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Microsoft Word – 471quiz4sol.docx QUIZ 4 CMPT 471 SOLUTION 1. [3 points] What is the difference between a capture filter and a display filter when you are using wireshark? Your answer should be no more 3 sentences long. A capture filter is applied to incoming packets before saving packets to a file. (1 point) If
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