Incorrect default gateway of the tftp server

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Tài liệu hướng dẫn giảng dạy I. GIỚI THIỆU DỊCH VỤ DHCP. M ỗ i thi ế t b ị trên m ạ ng có dùng b ộ giao th ứ c TCP/IP đề u ph ả i có m ộ t đị a ch ỉ IP h ợ p l ệ , phân bi ệ t. Để h ỗ tr ợ cho v ấ n đề theo dõi và c ấ p phát các đị a ch ỉ IP đượ c chính xác, t ổ ch ứ c IETF ( Internet Engineering Task Force ) đ ã phát tri ể n ra giao th ứ c DHCP ( Dynamic Host Configuration Protocol ). Giao th ứ c này đượ c mô t ả trong các RFC 1533, 1534, 1541 và 1542 . B ạ n có th ể tìm th ấ y các RFC này t ạ i đị a ch ỉ http://www.ietf.org/rfc.html . Để có th ể làm m ộ t DHCP Server , máy tính Windows Server 2003 ph ả i đ áp ứ ng các đ i ề u ki ệ n sau:

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NT LAN Manager Versions of Windows earlier than Windows 2000 used NT LAN Manager (NTLM) to provide net- work authentication. In a Windows Server 2003 environment, NTLM is used to communicate between two computers when one or both of them is running a pre-Windows 2000 operating system. NTLM will also be used by Windows Server 2003 computers that are not members of a domain. NTLM encrypts user logon information by applying a mathematical function (or hash) to the user’s password. A user’s password isn’t stored in the SAM or Active Directory database. Rather, the value of a hash that is generated when the user’s account is first created or the user’s password is changed, is stored. If the password is less than 15 characters long, two hashes are actually stored: an NT hash and a LM hash.The LM (or LAN Manager) hash is weak and can easily be broken by password crackers. Because of this it is recommended that you configure the Network security: Do not store LAN Manager hash value on next password change Group Policy setting.

ACCESS VPNS AND TUNNELING TECHNOLOGIES DOC

• NAS-initiated access VPNs—Users dial in to the ISP’s NAS, which establishes an encrypted tunnel to the enterprise’s private network. NAS-initiated VPNs are more robust than client-initiated VPNs, allow users to connect to multiple networks by using multiple tunnels, and do not require the client to maintain the tunnel-creating software. NAS-initiated VPNs do not encrypt the connection between the client and the ISP, but this is not a concern for most enterprise customers because the PSTN is much more secure than the Internet.

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Figure 4.63 The URLs Tab of the Properties Page for OAB (Default Web Site) T IP When it comes to detailed information about OABs, one of the best resources on the Internet is a blog run by Dave Goldman. Dave works as an Exchange Escalation Engineer (EE) for Microsoft in North Carolina and is, among other things, the guy behind the OABInteg tool, which is used to troubleshoot OAB issues. You can visit Dave’s blog at http://blogs.msdn.com/dgoldman.

MASTERING SQL SERVER 2000 SECURITY PHẦN 6 POTX

5. Configure the General, Advanced, and Connection tabs as you deem necessary. The Job System tab is described in more detail later in the section Job Security. The options for configuration are detailed next. In the General tab, you can configure the location of the error log file, enable the recording of execution trace messages (for troubleshooting), and enable the error file to be written as a non-Unicode file (resulting in a smaller log file size). Recording of execution trace messages can generate large files. You can also configure a recipient on the network to receive a Net Send pop-up message notification of errors recorded by the SQL Server Agent service. Configuring a mail session for the SQL Server Agent service is covered later in this chapter in the section Setting Up SQLAgentMail.

SSL VPN (WEB VPN) POTX

GatewayVPN(config-webvpn-context)#default-group-policy CLIENT # áp policy này vào context. Chú ý: Tạo một connected vào router cho pool-ssl cung cấp cho Client. Nếu không có connected nào cho pool-sll thì client kết nối đến sẽ GatewayVPN sẽ không đẩy soft xuống cho client được. Ở đây ta dùng loopback.

BÀI TẬP THỰC HÀNH MÔN CCNA1 LỚP C9CT3 4 C9CT11 12 C9CT13 14 PPSX

3) Từ bảng tính được ở câu 2, hãy phân phối địa chỉ IP một cách thích hợp lên các vị trí tương ứng của topology (ghi trực tiếp vào hình vẽ). 4) Trong Packet Tracer, tiến hành gán các thành phần địa chỉ IP cần thiết cho các thiết bị trong topology (PC, router, server).

APRESS BẮT ĐẦU ỨNG DỤNG VỚI JAVA GOOGLE - P 7 DOCX

■ ■ ■ Servlet Container and Frameworks Now that you’ve set up your development environment and configured the SDK, it's time to look at the design of your application. Out of the box, App Engine uses the Java Servlet standard for web applications, but you may be able to use your favorite framework as well. In this chapter we’ll look at different libraries and frameworks that run in App Engine. You’ll build a small application with servlets and JavaServer (JSP) pages as well as applications using Spring MVC and Adobe Flex with GraniteDS. Choosing a Framework

MICROSOFT FOREFRONT TMG – PUBLISH RD WEB ACCESS BẰNG RD GATEWAY P5 PPS

Hình 15: Nhập tên RD Gateway INTERNAL Server Lúc này hãy tạo một kết nối đến RD Gateway Server. Nếu kết nối thành công, bạn sẽ thấy một biểu tượng nữa trong Remote Desktop console, chỉ thị rằng bạn kết nối qua dịch vụ RD Gateway.

EXCHANGE SQL AND IIS P134 POT

N OTE If you want to move the mailboxes using the EMS, do so using the Move-Mailbox CMDlet. Using the Move-Mailbox CMDlet gives you a set of advanced options, among which the most interesting one is the option of specifying the number of mailboxes to be moved at a time (as you read earlier, the Move Mailbox Wizard is limited to four).

TÀI LIỆU BUILDING SOLUTIONS IN MICROSOFT® EXCHANGE 2000 WITH THE WEB STORAGE SYSTEM CLASSROOM SETUP GUIDE PPTX

to represent any real individual, company, product, or event, unless otherwise noted. Complying with all applicable copyright laws is the responsibility of the user. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of Microsoft Corporation. If, however, your only means of access is electronic, permission to print one copy is hereby granted.

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Confi guring the Hub Transport Server as an Internet-Facing Transport Server One of the design goals for Exchange 2007 was to be as secure as possible, by default, in the same way that the Hub Transport server is confi gured to only accept messages from internal Exchange users, Exchange servers, and legacy Exchange servers. This means that the Hub Transport server doesn’t accept inbound messages sent from unauthenticated (untrusted) e-mail servers, which typically defi ne external e-mail servers on the Internet. Instead, it expects to receive inbound messages from the Internet via an Edge Transport server in the perimeter network.

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Another important aspect of designing a server is making sure that it has a good environment. As a systems administrator, you must ensure the physical safety of your servers by keeping them in a separate, physically secure room. The only access to the servers for nonadministrative personnel should be through the network. The server room itself should be well ventilated, cool, and locked. Failing to ensure such a physical environment is an accident waiting to happen. Systems that overheat and helpful users who “think” they know how to fix problems can be as great a danger (arguably an even greater danger) to server stability as bad software. Moreover, Linux is particularly vulnerable to hacking at its command prompt.

MCITP WINDOWS SERVER 2008 SERVER ADMINISTRATOR STUDY GUIDE PHẦN 8 PPTX

In this chapter, you’ll learn about the different TS server services and IIS 7.0. You’ll notice in the list of objectives that address assignment, name resolu- tion, directory services, and certificate services are listed in the Planning for Server Deployment section, and presentation virtualization, resource allo- cation, System Center Configuration Manager, and offline data access are listed in Planning Application and Data Provisioning. Chapter 2, “Planning Server Deployments,” covers presentation virtualization. Chapter 3, “Using Windows Server 2008 Management Tools,” covers resource allocation and System Center Configuration Manager. Chapter 4, “Monitoring and Maintain- ing Network Infrastructure Servers,” covers address assignment and name resolution. Chapter 5, “Monitoring and Maintaining Active Directory,” covers directory services and Certificate Services. Chapter 6, “Monitoring and Main- taining Print and File Servers,” covers offline data access.

WEBMASTER''''S GUIDE TO THE WIRELESS INTERNET PART 9 POT

station.Typically, the mobile user isn’t interested in browsing your site as much as using it to find a specific piece of information—browsing is done on computer with a 17-inch monitor and a full keyboard. The mobile user is also in a hurry. Openwave (then Phone.com) has pre- sented the results of a study that found that for every click you require a mobile user to perform, you lose 50 percent of your site’s audience.These are impatient people on a slow connection, and you must ensure that you get them the infor- mation they are looking for as quickly and effortlessly as possible, or your com- petitor will end up with your customers.

GIÁO TRÌNH HƯỚNG DẪN PHÂN TÍCH IGRP VỚI CẤU TRÚC LỆNH SHOW IP PROTOCOLS P4 PDF

kết nối WAN với băng thông 56K sẽ nhanh chóng bị quá tải với mạng LAN băng thông 100Mbps của SOHO ,kết quả là dữ liệu sẽ bị mất và phải truyền lại nhiều lần .Máy tính có kêt nối ra Internet và giữ vai trò gateway để chia sẻ đường truy cập Internet này cho các máy tính còn lại có thể dùng thông điệp ICMP yêu cầu các máy tính khác giảm tốc độ truyền để trách việc mất mát dữ liệu do nghẽn mạch.

CHUYỂN MẠCH MỀM SOFTSWITCHING

TV PC XDSL TRUNK GATEWAY MGC SOFTSWICH BUSINESS/ RESIDENTAL USERS BUSINESS USERS MOBILE USERS ISP Application/ Feature Server SS7 SIGNALING GATEWAY TRANG 5 AAA: Accounting, Authenticatio[r]

CHUONG_3

TV PC XDSL TRUNK GATEWAY MGC SOFTSWICH BUSINESS/ RESIDENTAL USERS BUSINESS USERS MOBILE USERS ISP Application/ Feature Server SS7 SIGNALING GATEWAY TRANG 5 AAA: Accounting, Authenticatio[r]

COMPTIA NETWORK CERTIFICATION STUDY GUIDE PART 70 PDF

Correct answer and explanation: D. The packet will not be sent. Without that default gateway, you are stuck on the local network. The subnet mask, which you will learn about in the next chapter, is also very important. Without a prop- erly configured subnet mask to determine which subnet your computer is on, your computer will be unable to communicate outside of the local network.

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■ IP-PBX An IP-PBX is a PBX that operates with Internet Protocol (IP). This simplifi es the infrastructure because telephones can be connected to the same local area network (LAN) as the computers and servers. The IP-PBX switches calls to the appropriate phone by using the IP address of the telephone. For using IP-based telephony, all telephones must support the IP protocol. A hybrid IP-PBX supports IP phones, but is also able to connect traditional analog and digital telephones.

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Configuring Recycling Settings An alternative to stopping an application pool is to recycle it using the Recycle command in the Actions pane. This command instructs IIS to retire any current worker process automatically after it has executed existing requests. The benefit is that users will not see a disruption to ser- vice on their computer, but the worker process will be replaced by a new one as quickly as pos- sible. Recycling application pools is generally done when issues such as memory leaks or resource usage tend to increase significantly over time. Often, the root cause of this problem is a defect or other problem in the application code. The ideal solution is to correct the underly- ing application problem. However, it is possible at least to address the symptoms by using the

COMPTIA NETWORK CERTIFICATION STUDY GUIDE PART 74 DOC

It is 2 a.m. (EST) on a Friday night. You are at work sweating 2. because you cannot find a piece of configuration management documentation that would resolve this crazy issue that got you out of bed four hours ago. You have looked in the server room and now you are trying to break into your boss’s office to see if he has what you are looking for. Just last week your company hired a consult- ing firm to install new switches that can be remotely managed by your chief information officer’s Blackberry. You didn’t care nor did you pay any mind to what configuration management changes have occurred; you were too busy fighting off users’ password issues. But now, 2 a.m., on a Friday, you are in a real need of that document that describes the login procedures for the new switches. What type of configuration management documentation are you looking for? A. Physical network diagram documentation

I CƯƠNG VỀ ĐỊNH TUYẾN (--) POTX

Để nhìn thấy routing table trên router, chúng ta sử dụng câu lệnh: show ip route. Đoạn Code: xác định cách mà tuyến đường được học. Dòng Gateway of last resort is not set: cho biết routing table không có default gateway, nếu router nhận được một packet mà địa mạng đích không tìm thấy trong routing table thì router sẽ drop packet và gửi một bản tin ICMP network unreachable tới nơi gửi packet đó.

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GIÁO TRÌNH ADVANCED CERTIFICATE IN INFORMATION TECHNOLOGY SANLEIN PART 38 PPSX

Dòng Gateway of last resort is not set: cho biết routing table không có default gateway, nếu router nhận được một packet mà địa mạng đích không tìm thấy trong routing table thì router sẽ[r]

GIÁO TRÌNH CIS PART 38 PPT

CISCO NETWORK PART 37 PDF

Windows 7 Resource Kit- P26

*When creating and configuring firewall rules, use the scope filtering condition wherever possible. For example, if you do network backup and need to allow incoming connections from the backup service, configure the scope so that Windows Firewall allows connections only from the backup server’s IP address or network. Similarly, refine the scope for network management and remote administration tools to just those networks that require it. **Firewall rules can allow or block services regardless of where their executables are located on the computer. Services can be specified by their service name, even if the service is implemented as a dynamic-link library (DLL). Programs are identified by specifying the application path. (Specifying DLLs is not supported.) In addition, the ser- vice needs to have an associated service SID for this scoping to work correctly. To verify this, use the sc qsidtype

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Cụ thể là :  Media Gateway MG  Media Gateway Controller MGC - Call Agent - Softswitch  Signaling Gateway SG  Media Server MS  Application Server Feature Server _MEDIA GATEWAY MG_[r]

CCNAS1_3 DOCX

Refer to the exhibit. Host B attempts to establish a TCP/IP session with host C. During this attempt, a frame was captured at the FastEthernet interface fa0/1 of the San Francisco router. The packet inside the captured frame has the source IP address 10.10.1.2, and the destination IP address is 10.31.1.20. What is the destination MAC address of the frame at the time of capture?

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Trên router R1 trong GNS3, lưu file cấu hình startup-config vào TFTP server: R1#copy startup-config tftp:.. Address or name of remote host []?[r]

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B. Ntds files C. SYSVOL folder structure (đúng) D. Directory database You only need to update the shared folder object in Active Directory to ensure that all shortcuts pointing to a published shared folder will continue to work after the shared folder has been moved to another computer

COMPTIA NETWORK CERTIFICATION STUDY GUIDE PART 78 PDF

passes through it successfully. D. Use IMAP4 to send Internet e-mail to the server. Correct answers and explanations: A. Answer A is correct, because the telnet command can be used to verify that a port on a particular machine is open. Issuing the telnet command on port 25 will validate that the SMTP services which are responsible for inbound e-mail are up and functioning.

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ptg 55 The value of the default full-text language option is used when no language is speci- fied for a column through the LANGUAGE option in the CREATE FULLTEXT INDEX or ALTER FULLTEXT INDEX statements. If the default full-text language option is not supported or the linguistic analysis package is not available, the CREATE or ALTER operation doesn’t work, and SQL Server returns an invalid language specified error message. To see the list of linguistic analysis packages that are part of SQL Server 2008, you query the system view sys.fulltext_languages , as in this example:

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Ian McLean I n more innocent days, not all that long ago, security was mostly about ensuring that users you allowed to access your network were who they claimed to be. Users were authenticated by name and password, although even then it was considered bad practice to transmit passwords over a network in clear text. Encryption was used only in situations that were obviously risky such as using a private virtual net- work to send data through a potentially hostile environment such as the Internet. Secure HTTPS sites were simple. A purchaser sent name, address, and credit card information using SSL encryption, but almost everything else was done through HTTP.

MICROSOFT PRESS MCTS TRAINING KIT 70 - 647 ENTERPRISE ADMINISTRATOR PHẦN 10 PPS

1. Site-local IPv6 addresses are the direct equivalent of private IPv4 addresses and are routable between VLANs. However, you could also consider configuring every device on your network with an aggregatable global unicast IPv6 address. NAT and CIDR were introduced to address the problem of a lack of IPv4 address space, and this is not a prob- lem in IPv6. You cannot use only link-local IPv6 addresses in this situation because they are not routable.

200 CÂU HỎI THI TRẮC NGHIỆM VỀ CÔNG NGHỆ THÔNG TIN PHẦN 1 PPTX

Câu 27: Refer to the exhibit. Host A is requesting a web page from the web server. Which option represents the socket to which the request is made? The cable simulates a point-to-point WAN link. The cable is terminated in a way that the transmit pin is wired to the receive pin. The cable is unusable and must be rewired. The cable is suitable for connecting dissimilar types of devices. The cable is suitable for connecting a switch to a router Ethernet port.

MICROSOFT PRESS WINDOWS SERVER 2008 ACTIVE DIRECTORY RESOURCE KIT - PART 4 PPT

Introduction to Kerberos There are three components in a Kerberos-based system. The first is the client who needs to gain access to network resources. The second is the server that manages the network resources and ensures that only properly authenticated and authorized users can gain access to the resource. The third component is a Key Distribution Center (KDC), which serves as a central location to store user information and as a central service to authenticate users. The Kerberos protocol defines how these three components interact. This interaction is based on two key principles. First of all, Kerberos operates on the assumption that authentication traffic between a workstation and server crosses an insecure network. This means that no con- fidential authentication traffic is ever sent across the network in clear text. A practical example of this is that the user password is never sent across the network, not even in an encrypted form. The second principle is that Kerberos operates based on a shared secret authentication model. In a shared secret authentication model, the client and the authenticating server share a secret that is not known by anyone else. In most cases, when users are authenticating to the network, this shared secret is the user password. When the user logs on to a network secured by Kerberos, a hash of the user’s password is used to encrypt a packet of information. When the KDC receives the packet, it decrypts the information using the stored user pass- word hash that is stored in AD DS. If the decryption is successful, then the authenticating server knows that the user knows the shared secret and access is granted.

CHAPTER 1 CCNA1 DOCX

the default gateway the locally configured subnet mask the routing protocol active TCP connections CÂU 20: WHICH TWO TYPES OF MEDIA CAN PROVIDE BANDWIDTH UP TO 1 GB/S?CHOOSE TWO 1000 BAS[r]

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Từ khóa: giám đốc nghe nói đọc viết ban giám đốc kiểm toán độc lập độc tố giám đốc bán hàng Nghiên cứu sự biến đổi một số cytokin ở bệnh nhân xơ cứng bì hệ thống chuyên đề điện xoay chiều theo dạng Nghiên cứu sự hình thành lớp bảo vệ và khả năng chống ăn mòn của thép bền thời tiết trong điều kiện khí hậu nhiệt đới việt nam Một số giải pháp nâng cao chất lượng streaming thích ứng video trên nền giao thức HTTP Giáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôit Giáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôit Giáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôit Quản lý hoạt động học tập của học sinh theo hướng phát triển kỹ năng học tập hợp tác tại các trường phổ thông dân tộc bán trú huyện ba chẽ, tỉnh quảng ninh Phối hợp giữa phòng văn hóa và thông tin với phòng giáo dục và đào tạo trong việc tuyên truyền, giáo dục, vận động xây dựng nông thôn mới huyện thanh thủy, tỉnh phú thọ Nghiên cứu tổng hợp các oxit hỗn hợp kích thƣớc nanomet ce 0 75 zr0 25o2 , ce 0 5 zr0 5o2 và khảo sát hoạt tính quang xúc tác của chúng Định tội danh từ thực tiễn huyện Cần Giuộc, tỉnh Long An (Luận văn thạc sĩ)Thơ nôm tứ tuyệt trào phúng hồ xuân hương Kiểm sát việc giải quyết tố giác, tin báo về tội phạm và kiến nghị khởi tố theo pháp luật tố tụng hình sự Việt Nam từ thực tiễn tỉnh Bình Định (Luận văn thạc sĩ)BT Tieng anh 6 UNIT 2 Tăng trưởng tín dụng hộ sản xuất nông nghiệp tại Ngân hàng Nông nghiệp và Phát triển nông thôn Việt Nam chi nhánh tỉnh Bắc Giang (Luận văn thạc sĩ)Tranh tụng tại phiên tòa hình sự sơ thẩm theo pháp luật tố tụng hình sự Việt Nam từ thực tiễn xét xử của các Tòa án quân sự Quân khu (Luận văn thạc sĩ)Giáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vật Giáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vật Giáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vật HIỆU QUẢ CỦA MÔ HÌNH XỬ LÝ BÙN HOẠT TÍNH BẰNG KIỀM