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If your firewall allowed only the machine with the IP address 192.168.1.1 to send email outside the network, how would you instruct your local copy of sendmail to use this server as a relay?
All necessary intermediate devices and a description of what they are IP address, subnet mask, and default gateway information on each node on the two networks and on all intermediate device
Discuss wired vs. wireless networking. What are the advantages and disadvantages of each? Consider installation cost, security, network footprint and reliability.
When a remote user attempts to dial in to the network, the network access server (NAS) queries the TACACS+ server. If the response is "FAIL", this means
Flexibility - phones can be added or moved to different offices but rewiring and reconfiguring the network would be necessary
Dose any body have any notes routing protocls and concepts. it is a cisco class. The class use to be netw204. Now netw205 proble not a big differnce
After the user enters the plain message/ciphered text, the program should return the encrypted/decrypted message
The assigned IP configurations including IP address, subnet mask, and default gateway wherever needed
Respond to the following: "If you were a project manager in charge of employees affected by the above situation, what approach might you use to discuss the issue with upper management"?
Suppose that the new WLAN will also provide roaming services for employees with portable notebook computers. Which wireless topology will be required?
Find the minimum required bandwidth for the baseband transmission of an 8-level PAM pulse sequence having a data rate, Rb, of 9600 bps. The system characteristics consist of a raised-cosine spectrum w
How many places has each letter been shifted in the Caesar cipher used to encode the message XNQQD RJXXFLJ
One of the characteristics of a public key system is that the encipherment and decipherment keys are different. Why then is the Caesar cipher a classical cryptosystem, not a public key
Because of known risks of the UNIX password system, it has been recommended that the system be replaced by an alternative system that uses public key cryptography, RSA for example.
How could you use a cryptographic hash function, such as SHA-1, to implement a simple antivirus program? Explain what the limitations would be, if any?
Suppose it were illegal to use key sizes greater than 40 bits? How could you use an algorithm such as DES or AES and still manage to be legal?
Assume that we are receiving a message across a network using a modem with a rate of 56,000 bits per second. Furthermore, assume that we are working on a workstation with an instruction rate of 500 MI
Why would a variation of RSA encryption/decryption where a single prime number is used the modolus insecure? How can someone recover a message x from the encrypted value y using the parameters (e,p),
Do we really need a change in the way the IS function is structured? Are the necessary changes just minor modifications to accommodate normal growth and computer usage?
Is a cellular connection an appropriate type of link for use in a WAN? Can it be a primary link? Can it be used as a backup link dialed on demand?
Below are ciphertext from Vigenere cipher. Determine the plaintext and key. Give a clearly written description of the steps you followed to decrypt each ciphertext. This should include all frequency a
Consider a ring network of n nodes where each node has associated a pos- itive integer. At each node, one links is labeled left and the other right.
You have been hired by a small company to install a backbone to connect four 100base-T Ethernet LANs (each using one 24-port hub) and to provide a connection to the Internet. Develop a simple backbone
The following are the 4 main wireless technologies used to access various network resources:
What are the roles of Chief Knowledge Officer TODAY? Compare and contrast with the roles of the Chief Information Officer. " Please provide the references