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Course: MIS 4850, Fall 2009School: N.E. Illinois
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Internetworking TCP/IP Review Questions (Answers in class notes or Chapter 3 of book.) 3-1. What do we call messages at the data link layer? a. Frames b. Packets c. Both of the above. d. Neither a. nor b. Which of the following is true? a. Packets are encapsulated in frames. b. Frames are encapsulated in packets. c. Neither a. nor b. If Layer N receives a message, which layer de-encapsulates the message? a. N+1 b....
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Internetworking TCP/IP Review Questions (Answers in class notes or Chapter 3 of book.)
3-1. What do we call messages at the data link layer? a. Frames b. Packets c. Both of the above. d. Neither a. nor b. Which of the following is true? a. Packets are encapsulated in frames. b. Frames are encapsulated in packets. c. Neither a. nor b. If Layer N receives a message, which layer de-encapsulates the message? a. N+1 b. N c. N-1 d. Any of the above e. None of the above Which of the following does a router do first when they receive? a. encapsulates b. decapsulates c. Neither a. nor b. d. Both a. and b. Which of the following is connectionless? a. IP b. UDP c. TCP d. Both a. and b. The network part of an IP address is ___ bits long. a. 8 b. 16 c. 24 d. 32 e. The length of the network part is variable. In general, how can you tell the size of an IP address network part? a. It is always 16 bits long. b. You can tell by knowing network or subnet mask. c. Both of the above are true. Firewalls read the IP _____ field to know how to filter the packets data field. a. protocol TTL b. c. Both of the above. Page 1 of 2
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d. Neither a. nor b. How many messages are sent in a TCP opening? a. One b. Two (the message and its acknowledgement) c. Three d. Four e. Many
3-10. How many messages are sent in a normal TCP close? a. One b. Two (the message and its acknowledgement) c. Three d. Four e. Many 3-11. How many messages are sent in an abrupt TCP close, i.e. in a Reset? a. One b. Two (the message and its acknowledgement) c. Three d. Four e. Many 3-12. Mail servers use _____ port numbers in their source port number fields when they transmit. a. ephemeral b. registered c. well-known 3-13. Which is more complex and so presents more opportunities for protocol abuse? a. TCP b. UDP c. Both of the above. d. Neither a. nor b. 3-14. The lowest possible host address in the /24 block of addresses containing host 60.37.12.98 is _____. a. 60.0.0.1 b. 60.37.0.1 c. 60.37.12.1 d. 0.0.0.1 3-15. What is the address class of the network containing host 140.37.12.98? a. Class A b. Class B c. Class C
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N.E. Illinois - MIS - 4850
MIS 4850 Systems Security Internetworking & TCP/IP RoutingTuesday 2/10/2009Student Name: _ Exhibit: Row 1 2 3 4 5 6 7 8 9 10 11 12 Destination or network subnet 128.171.0.0 172.30.33.0 60.168.6.0 123.0.0.0 172.29.8.0 172.40.6.0 128.171.17.0 172.29.
N.E. Illinois - MIS - 4850
Lab 2Tuesday 2/24/2009Page 1/4Lab 2Student name: _ Computer #: _ Part 1: Using Netbus 1.7 for remote controlYou need to work in teams of two. One teammate (referred to as Student 1) will install the server portion of Netbus (Patch.exe) on his
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MIS 4850 Systems SecurityUnderstanding Firewalls OperationExhibit 1Figure 1: Access Control List (ACL) for INGRESS Filtering at a border firewallTrusted network60.47.3.1 60.47.3.5Firewall60.47.3.2 60.47.3.9Untruste d1 2 3 4 5 6 7 8 9 10
N.E. Illinois - MIS - 4850
<?xml version="1.0" encoding="UTF-8"?> <Error><Code>NoSuchKey</Code><Message>The specified key does not exist.</Message><Key>a0e9c601c3dc334cabe4ce335ba67addd6ce13b3.ppt</Key><RequestId>4 B5BB5D57F5E9799</RequestId><HostId>3jnseC2Xu6fMhAffZ5mhMc2jXd+
N.E. Illinois - MIS - 4850
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N.E. Illinois - MIS - 4850
ExhibitIP 10.1.10.2 10.1.10.3 10.1.10.4 10.1.10.5 10.1.10.6 ARP TABLE MAC 80:U6:90:C1:22 80:U6:90:C1:23 80:U6:90:C1:24 80:U6:90:C1:25 80:U6:90:C1:26Workstation 1 Workstation 2IP 10.1.10.1 10.1.10.3 10.1.10.4 10.1.10.5 10.1.10.6ARP TABLE MAC 80:
N.E. Illinois - MIS - 4850
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N.E. Illinois - MIS - 4850
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