Chapter 9 Connecting to and Setting Up a Network Reviewing the Basics 1. How many bits are in a MAC address? 48 bits 2. How many bits are in an IPv4 IP address? In an IPv6 IP address? 32 bits‚ 128 bits 3. How does a client application identify a server application on another computer on the network? By a port number 4. What are IP addresses called that begin with 10‚ 172.16‚ or 192.168? Private IP addresses 5. In what class is the IP address 185.75.255.10? Class B 6. In what class is the IP address
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command and enable it immediately without a physical re-boot of the system‚ what command must you enable in front of the command parameter? Explain what the following command will do : echo “1” > /proc/sys/net/ipv4/ip_forward The command would enable the kernel along with activating IPv4 forwarding. The system requires a value of either 1 or a 0 with 1 being on and 0 being off. So the command would write the number 1 in the file to activate it. 5. If you wanted to limit the number of files that
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it? Class C Are you able to identify it based on the first octet‚ by the subnet mask‚ or both? Both Is your IP address part of the private address block? No 2. Does the use of subnet masking invalidate any of the classful address assignments in IPv4 or does it expand the addressing capabilities while upholding the class rules for older addresses? It does not. It follows the rules allowing all connected devices to work while under some variant of an individual IP address.
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SUBNETWORKS SUB NETWORKS Introduction:- With available IP network numbers rapidly becoming an endangered species‚ efficient use of this increasingly scarce resource is important. This document describes how to split a single IP network number up so that it can be used on several different networks.
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1. IP hosts in two different company TCP/IP networks send IP packets to each other through the Internet. Which of the following is true about the Internet connections that must exist so that the packets can flow between the two companies? a. The two companies must connect directly to each other. b. The two companies must each have at least one Internet access link. c. The two companies must connect to the same ISP. d. The two companies must each connect to a Tier 1 ISP. 2. Which of
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configuration 1) Configure the network interface to give a static IP address to the DHCP server Edit the file /etc/network/interfaces 2) Use the command sudo apt-get install isc-dhcp-server in the terminal to install DHCP. 3) For the DHCP to assign Ipv4 addresses edit the file /etc/dhcp/dhcpd.conf and provide the range of address you want to the DHCP server to assign. 4) For ipv6 address‚ create a new file dhcpd6.conf and then configure the range of ipv6 addresses which needs to be assigned. The
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Breaking 104 bit WEP in less than 60 seconds Erik Tews‚ Ralf-Philipp Weinmann‚ and Andrei Pyshkin <e tews‚weinmann‚pyshkin@cdc.informatik.tu-darmstadt.de> TU Darmstadt‚ FB Informatik Hochschulstrasse 10‚ 64289 Darmstadt‚ Germany Abstract. We demonstrate an active attack on the WEP protocol that is able to recover a 104-bit WEP key using less than 40‚000 frames with a success probability of 50%. In order to succeed in 95% of all cases‚ 85‚000 packets are needed. The IV of these packets can be randomly
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be achieved using Jpcap library to build an ARP packet‚ Ethernet packet and other packet types. Winpcap is also used to supplement the network program in accessing the raw network resources (i.e. Winsock for Windows). This program is used for an IPv4 network and run under Windows platform. The program will only be used for educational purposes‚ thus‚ any network security holes exploited by this program is for education studies
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reduce the time needed to start the DNS server service. The impact will probably only be noticeable for very large zones. 5. Explain how DNS has been modified to add support for IP version 6 (IPv6). How can DNS distinguish between an IP version 4 (IPV4) and IPv6 host in determining
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4 Review Questions 5. What is the function of ARP? (D) To obtain the MAC address of a host‚ and then map that MAC address to the host’s IP address. 7. Suppose you have a workstation that uses the IP address 203.12.176.55 on a traditional IPv4 network. To what network class does the workstation belong? (C) C 15. What devices are the highest authorities in the domain name system hierarchy? (A) Root servers 25. Which of the following protocols will assist in determining whether packets
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