Subnet A: 132 hosts 192.168.50.0/23 Subnet C: 22 hosts Subnet B. 122 hosts Consider the router and the three attached subnets. Assign contiguous subnet addresses to each of the subnets (A, B, and C) so that the amount of address space assigned is minimal, and at the same time leaving the largest possible contiguous address space available for assignment if a new subnet were to be added. Note that the free contiguous address space after assigning the subnets should be at the higher end of the address space, i.e. [ABC(available_address)]. a. What are the subnet addresses of subnets A, B, and C? (CIDR notation) b. Given your answer to question (a), what is the broadcast address of subnets A, B, and C?

Subnet A: 132 hosts 192.168.50.0/23 Subnet C: 22 hosts Subnet B. 122 hosts Consider the router and the three attached subnets. Assign contiguous subnet addresses to each of the subnets (A, B, and C) so that the amount of address space assigned is minimal, and at the same time leaving the largest possible contiguous address space available for assignment if a new subnet were to be added. Note that the free contiguous address space after assigning the subnets should be at the higher end of the address space, i.e. [ABC(available_address)]. a. What are the subnet addresses of subnets A, B, and C? (CIDR notation) b. Given your answer to question (a), what is the broadcast address of subnets A, B, and C?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Suppose within your web browser you click on a link to obtain a Web page. The IP address for the associated URL is not cached in your local host, so a DNS lookup is necessary to obtain the IP address. Suppose that three DNS servers are visited before your host receives the IP address from DNS. The first DNS server visited is the local DNS cache, with an RTT delay of RTT = 4 msecs. The second and third DNS servers contacted have RTTs of 45 and 24 msecs, respectively. Initially, let's suppose that the Web page associated with the link contains exactly one object, consisting of a small amount of HTML text. Suppose the RTT between the local host and the Web server containing the object is RTTHTTP = 9 msecs. Assuming zero transmission time for the HTML object, how much time elapses from when the client clicks on the link until the client receives the object? (Do not forget the TCP handshake(s).) 82 msecs O 91 msecs O 46 msecs O 67 msecs
4.2-1a. Packet scheduling (FCFS). Consider the pattern of red and green packet arrivals to a router's output port queue, shown below. Suppose each packet takes one time slot to be transmitted, and can only begin transmission at the beginning of a time slot after its arrival. Indicate the sequence of departing packet numbers (at t = 1, 2, 3, 4, 5, 6, 7) under FCFS scheduling. Give your answer as 7 ordered digits (each corresponding to the packet number of a departing packet), with a single space between each digit, and no spaces before the first or after the last digit, e.g., in a form like 7 6 5 4 3 21). arrivals packet in service departures 0 234 ???? ? ? ? ? IN 5 67 2 3 1+ ??? 5 ←s 6
55- A network for a local office requires 4 LAN subnets as follows: · Subnet A - North Office with 31 hosts; · Subnet B - East Office with 15 hosts; and · Subnet C - South Office with 7 hosts. · Subnet D – West Office with 4 hosts. Given the IP Address 192.168.15.0 /24 and above described network requirements: 1. Design an optimal address scheme using Variable Length Subnet Mask (VLSM) method; What will be the network address of Subnet C? Select one: A. 192.16.15.128 B. 192.168.15.191 C. 192.168.15.96 D. 192.168.15.32
4.02. Subnet addressing. Consider the three subnets below, each in the larger 128.119.160/24 network. The following questions are concerned with subnet addressing. Answer each question by selecting a matching answer. Each answer can be used to answer only one question. [Note: You can find more examples of problems similar to this here.] A 128.119.160/24 В 48 hosts 21 hosts 50 hosts A. V What is the aximum number of hosts possible the larger A. 256 128.119.160/24 network? B. 2**32 E. V How many bits are needed to be able to address all of the host in subnet C 64 А? D. 6 C. v Suppose that subnet A has a CIDRized subnet address range of 128.119.160.128/26 (hint: 128 is 1000 0000 in binary); Subnet B has an CIDRied subnet address range of 128.119.160.64/26. We now want a valid CIDRized IP subnet address range for subnet C of the form 128.119/160.x/26. What is a valid value of x? E. 96 F. O
54- A network for a local office requires 4 LAN subnets as follows: · Subnet A - North Office with 31 hosts; · Subnet B - East Office with 15 hosts; and · Subnet C - South Office with 7 hosts. · Subnet D – West Office with 4 hosts. Given the IP Address 192.168.15.0 /24 and above described network requirements: 1. Design an optimal address scheme using Variable Length Subnet Mask (VLSM) method; and What will be the subnet mask of Subnet B? Select one: A. 255.255.128.255 B. 255.255.192.0 C. 255.255.192.192 D. 255.255.255.192 E. 255.255.255.224
1) Three-way handshake to establish connection (Host A sends a SYN) to the host B. Then Host B returns a and Host A sends an---- 2) In non-persistent HTTP, the file transmission Response time= 3) A class B network number uses hits for the network number and -bits for host numbers. 4) When host makes DNS query, in first step the query is sent to its 5) The values assigned to the first byte of class A network numbers fall within the range -------
2. The following illustration shows a transmission from Host A to Host B using Network Address Translation (NAT). Host A is located inside a Local Area Network (LAN) with an IP address of 192.168.1.2. The LAN is connected to the Wide Area Network (WAN), i.e. the Internet, through a router R1 that conducts NAT. R1 has two interfaces with an internal LAN IP address (192.168.1.1) and and external WAN IP address (127.45.10.35). Host B is located outside the LAN and is a well-known server, e.g., Google's server. Host B has an IP address of 130.160.23.45. Port numbers for the application components running at both hosts are provided in the figure. For a single message M1 being sent from Host A to Host B, please fill in the blanks in the illustration below with the source IP address and Port number at Host A and at the Router R1. Any information not provided may be assumed, however, please state your assumption clearly. Host A Local Area Network (LAN) IP: 192.168.1.2 Port: 5252 Source IP…
Using vlsm, subnet the network 192.168.42.0/24, there are 3 departments, ensure there’s enough address to accommodate the needs of each department. Department A has 70 hosts, Department B has 50 and Department C has 28, find the subnet, first host, last host, Broadcast id and Mask
4.02. Subnet addressing. Consider the three subnets below, each in the larger 128.119.160/24 network. The following questions are concerned with subnet addressing. Answer each question by selecting a matching answer. Each answer can be used to answer only one question. [Note: You can find more examples of problems similar to this here.] : A 128.119.160/24 48 hosts 21 hosts 50 hosts C A. V What is the maximum number of hosts possible in the larger 128.119.160/24 network? A. 256 B. 2**32 E. v How many bits are needed to be able to address all of the host in subnet C 64 A? D. 6 C. v Suppose that subnet A has a CIDRized subnet address range of 128.119.160.128/26 (hint: 128 is 1000 0000 in binary); Subnet B has an E. 96 CIDRied subnet address range of 128.119.160.64/26. We now want a valid CIDRized IP subnet address range for subnet C of the form 128.119/160.x/26. What is a valid value of x? F. 0
7. Consider the router and the three attached subnets. Assign contiguous subnet addresses to each of the subnets (A, B, and C) so that the amount of address space assigned minimal, and at the same time leaving the largest possible contiguous address space available for assignment if a new subnet were to be added. Note that the free contiguous address space after assigning the subnets should be at the higher end of the address space, i.e. [ABC (available_address)]. a. What are the subnet addresses of subnets A, B, and C? (CIDR notation) b. Given your answer to question (a), what is the broadcast address of subnets A, B, and C?
5. A wireless Base Station (BS) is serving N users with a single channel having a capacity C bits/second. The BS has two options for serving the users a) Option1: BS divides the channel into multiple sub-channels using FDMA and assigns a dedicated sub-channel to each user and process his traffic in a separate buffer. b) Option2: BS put the traffic from all users in one buffer and transmits all traffic packet- by-packet on the same channel in a first-come-first serve order 1 Compute the transmission time of each packet (on the air) for Option1 and Option2 if the packet size is L bits.
Q3) Consider weighted queueing scheme with three queues at the output port. The weights assigned to queues are w = 4, w = 2, and w = 1. The contents of each queue at time t1 are shown in below Figure. Assume packets are all the same size and that transmission time for each is 1 micro-second. Answer the following: a) Using timeline, show the departure time for each packet,