You are sending an instant message, How are you? to your friend. How many digital bytes...
You are sending an instant message, How are you? to your friend. How many digital bytes and bits does this message contain?
Homework Answers
How are you? above message has 12 letters. so, size of message is 12 bytes. 1 byte = 8 bits. so, size of message is 12*8=96 bits. 12 bytes and 96 bits.
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You are sending an instant message, How are you? to your friend.
How many digital bytes...
Q2.3. (15%) Consider sending a file of F bytes over a path of Q links. Each...
Q2.3. (15%) Consider sending a file of F bytes over a path of Q links. Each link transmits at R bps. The network is lightly loaded so that there are no queuing delays at any link. The propagation delay on each link is Tp seconds on average. 1. Suppose the network is a packet-switched virtual-circuit network. Assume the VC setup time is Ts seconds. Suppose the sending layers add a total of h bits of header to the file, and...
Suppose, Bob (the sender) wants to send a message to Alice. Before sending the message, Bob generates a digital signatur...
Suppose, Bob (the sender) wants to send a message to Alice. Before sending the message, Bob generates a digital signature. Assume that Bob and Alice use both of the public-key cryptography system and hash function when computing digital signatures. Say, the hash function used to compute and verify signatures is insecure, but the public-key cryptography system is secure. Show that Trudy can forge signatures.
Suppose, Bob (the sender) wants to send a message to Alice. Before sending the message, Bob generates a digital signatur...
Suppose, Bob (the sender) wants to send a message to Alice. Before sending the message, Bob generates a digital signature. Assume that Bob and Alice use both of the public-key cryptography system and hash function when computing digital signatures. Say, the hash function used to compute and verify signatures is insecure, but the public-key cryptography system is secure. Show that Trudy can forge signatures.
consider sending a message of <Hi> that consists of 16-bit from source to destination. Your message...
consider sending a message of <Hi> that consists of 16-bit from source to destination. Your message must go through the channel coding anf line coding before transmit. (design own information interchange code) (a) consider the use if hamming codes in the channel coding to endocode the 16-bit message (i) construct the hamming codeword for this message. (ii) bt inverting one message bit in Hamming codeword(to represent a 1bit-error) and demonstrate how the recipient can use thr check bits to correct...
a) A memory unit has 28-bit address lines and 64-bit input/output data lines. How many bytes...
a) A memory unit has 28-bit address lines and 64-bit input/output data lines. How many bytes of data can this memory hold? How many words does it contain, and how large is each word? b) A memory unit consists of 32M words of 16-bit each. How many bits wide address lines and input-output data lines are needed to access this memory? c) A memory unit consists of 512K bytes of data. How many bits wide address lines are needed to...
How many bytes does a 64 KB microprocessor memory contain? Note: 1 KB = 2^10 bytes...
How many bytes does a 64 KB microprocessor memory contain? Note: 1 KB = 2^10 bytes 1 MB = 2^20 bytes 1 GB = 2^30 bytes
Consider sending a datagram of size 2400 bytes into a link whose MTU is 700. How...
Consider sending a datagram of size 2400 bytes into a link whose MTU is 700. How many fragmentations are generated? Show the length, fragflag and offset fields of each IP datagram after fragmentation.
Exercise l: Suppose that we have a virtual memory space of 28 bytes for a given process and physical memory of 4 page frames. There is no cache. Suppose that pages are 32 bytes in length. 1) How...
Exercise l: Suppose that we have a virtual memory space of 28 bytes for a given process and physical memory of 4 page frames. There is no cache. Suppose that pages are 32 bytes in length. 1) How many bits the virtual address contain? How many bits the physical address contain? bs Suppose now that some pages from the process have been brought into main memory as shown in the following figure: Virtual memory Physical memory Page table Frame #...
Problem 14: Consider sending a 2400-byte datagram into a link that has an MTU of 800 bytes. Suppose that the original d...
Problem 14: Consider sending a 2400-byte datagram into a link that has an MTU of 800 bytes. Suppose that the original datagram is stamped with the identification number 228. How many segments are generated? What are the values in the length, ID, fragment flag, and fragment offset in each fragment? (Assume 20 bytes of IP header)
Given a direct-mapped cache that will contain 32,768 bytes of data and four-word blocks (where each...
Given a direct-mapped cache that will contain 32,768 bytes of data and four-word blocks (where each word is 4 bytes) and assuming 32-bit addressing; How many additional bits are required for the overhead associated with the 32,768 bytes of data? What is the overhead (additional space required) for the 32,768 bytes of data, expressed as a percentage?
Q2.3. (15%) Consider sending a file of F bytes over a path of Q links. Each link transmits at R bps. The network is lightly loaded so that there are no queuing delays at any link. The propagation delay on each link is Tp seconds on average. 1. Suppose the network is a packet-switched virtual-circuit network. Assume the VC setup time is Ts seconds. Suppose the sending layers add a total of h bits of header to the file, and...
Exercise l: Suppose that we have a virtual memory space of 28 bytes for a given process and physical memory of 4 page frames. There is no cache. Suppose that pages are 32 bytes in length. 1) How many bits the virtual address contain? How many bits the physical address contain? bs Suppose now that some pages from the process have been brought into main memory as shown in the following figure: Virtual memory Physical memory Page table Frame #...
Problem 14: Consider sending a 2400-byte datagram into a link that has an MTU of 800 bytes. Suppose that the original datagram is stamped with the identification number 228. How many segments are generated? What are the values in the length, ID, fragment flag, and fragment offset in each fragment? (Assume 20 bytes of IP header)
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