Assume we need to impose a specific traffic type from the internet to propagate only through:R4-SW1-R1 - R5 R6-SW2The ACL list statment is as follow:access-list 150 deny tcp any any eq 80access-list 150 deny tcp any any eq 443access-list 150 permit ip any anyWhat is the type of traffic imposed by this ACL? *HTTPHTTPSDNSTelnetFTP

What is the type of traffic imposed by ACL?

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What is the type of traffic imposed by this ACL? HTTP HTTPS DNS Telnet FTP

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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Download delays for 100 objects (HTTP 1.1 with browser caching). Consider an HTTP 1.1 client and server. The RTT delay between the client and server is 2 seconds. Suppose the time a server needs to transmit an object into its outgoing link is 3 seconds, as shown below for the first of these 100 requests. initiate TCP connection RTT request file RTT file received time You can assume that any other HTTP message not containing an object sent by the client and server has a negligible (zero) transmission time. Suppose the client makes 100 requests, one after the other, waiting for a reply to a request before sending the next request. 352 secs Using HTTP 1.1, how much time elapses between the client transmitting the first request, and the receipt of the last requested object, assuming the client uses the IF- MODIFIED-SINCE header line, and 50% of the objects requested have not changed since the client downloaded them (before these 100 downloads are performed)? 350 secs 252 secs time to…
Consider an HTTP 1.1 client and server. The RTT delay between the client and server is 1 seconds. Suppose the time seconds. server needs to transmit an object into its outgoing link is 3 initiate TCP connection RTT request file RTT. time to -transmit file file received time time You can assume that any other HTTP message not containing an object sent by the client and server has a negligible (zero) transmission time. Suppose the client makes 30 requests, one after the other, waiting for a reply to a request before sending the next request. Using HTTP 1.1, how much time elapses between the client transmitting the first request, and the receipt of the last requested object?
SMTP (Simple Mail Transfer Protocol) is the standard protocol for transferring mail between hosts. A TCP connection is set up between a user agent and a server program. The server listens on TCP port 25 for incoming connection requests. The user end of the connection is on a TCP port number above 1023. You have defined the packet filter rule set shown in the table below. These rules permit and/or deny inbound and outbound traffic between the user agent and the mail server. Describe the purpose of each packet filter rule in the table. Rule Direction Source Address Destination Address Protocol Destination Port Action A2 In External Internal TCP 25 Permit B2 Out Internal External TCP > 1023 Permit C2 Out Internal External TCP 25 Permit D2 In External Internal TCP > 1023 Permit E2 Either Any Any Any Any Deny
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
CIS269 Packet Translation Lab Break down the following IP datagram into its individual fields, listing the value of each. Hint: It’s an IP datagram containing a TCP segment containing another protocol… 45 00 00 31 94 00 40 00 80 06 1B 9F 80 A3 C9 29 D8 45 29 15 04 09 00 15 00 00 C3 A1 DF 65 A8 45 50 18 20 AA 8E 8C 00 00 43 57 44 20 66 75 6E 0D 0A
7.1 In IEEE 802.11, open system authentication is accomplished via a simple two-way communication. The client requests authentication, which includes the station ID, which is provided by the server (typically the MAC address). A successful or unsuccessful authentication response from the AP/router is received in response to the previous request from the client. For instance, if the client's MAC address has been expressly omitted from the AP/router setup, a failure may occur.a. What are the advantages of using this kind of authentication scheme?b. What are the security flaws in this authentication method and how may they be mitigated?
There are 4 routers Router A, B, C and D Router B and D are connected in a network system, RIP is the routing protocol running on the routers, DV(distance vector) algorithm is the routing algorithm for RIP, a new link is added to the system to conect router A and C, will this addition trigger router A to re-compute its DV?
True or false 6. Before sending a data packet into a packet-switching network, the source must determine all of the links that the packet will traverse between source and destination. 7. With non-persistent connections between a web browser and a web server, it is possible for a single TCP segment to carry two distinct HTTP request messages.
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5 Internet Protocol version 4 (IPv4) was deployed on 1 January 1983. The addressformat in IPv4 is a 32-bit numeric value often expressed with four octets from theinterval [0, 255] separated by periods. At the time of writing this book, InternetProtocol version 6 (IPv6), with 128 bit-wide addresses, is slowly replacing IPv4. Intheory, how many IP addresses can be assigned in IPv4 and IPv6?
Select the FALSE statements as shown below: i) Two distinct Web pages (e.g., www.uthm.edu.my/research.html and www.uthm.edu.my/students.html) can be sent over the same persistent connection. ii) With non-persistent connections between browser and origin server, it is possible for a single TCP segment to carry two distinct HTTP request messages. iii) The Date: header in the HTTP response message indicates when the object in the response was last modified. iv) HTTP response messages never have an empty message body. a) i, ii, and iii b) i, ii, and iv c) i, iii, and iv d) ii, iii, and iv
B. 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 two 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 RTTO = 5 msecs. The second DNS server contacted has an RTT of 8 msecs. 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=63 msecs. 1. 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? 2. Suppose the HTML object references 4 very small objects on the same web server. Neglecting transmission times, how much time elapses from when the client…