SNMP operates in the application layer of the Internet protocol suite. All SNMP messages are transported via User Datagram Protocol (UDP). The SNMP agent receives requests on UDP port 161. The manager may send requests from any available source port to port 161 in the agent. The agent response is sent back to the source port on the manager. The manager receives notifications (Traps and InformRequests) on port 162. The agent may generate notifications from any available port. When used with Transport Layer Security or Datagram Transport Layer Security, requests are received on port 10161 and notifications are sent to port 10162.[3]

SNMPv3 may be subject to brute force and dictionary attacks for guessing the authentication keys, or encryption keys, if these keys are generated from short (weak) passwords or passwords that can be found in a dictionary. SNMPv3 allows both providing random uniformly distributed cryptographic keys and generating cryptographic keys from a password supplied by the user. The risk of guessing authentication strings from hash values transmitted over the network depends on the cryptographic hash function used and the length of the hash value. SNMPv3 uses the HMAC-SHA-2 authentication protocol for the User-based Security Model (USM).[29] SNMP does not use a more secure challenge-handshake authentication protocol. SNMPv3 (like other SNMP protocol versions) is a stateless protocol, and it has been designed with a minimal amount of interactions between the agent and the manager. Thus introducing a challenge-response handshake for each command would impose a burden on the agent (and possibly on the network itself) that the protocol designers deemed excessive and unacceptable.[citation needed]


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Also called software versioning workflow, versioning can be an internal practice used to make it easier for developers to keep track of code evolution. During development, teams involved in the process may apply internal versioning numbers that can be incremented several times within a day. In contrast, the publicly released version usually does not change very often. For instance, the internal version number used by the development teams for Java SE 5.0 is 1.5.0.

When network congestion is identified, CenturyLink uses various techniques to create a good customer experience. Our network management techniques include preventing virus/spam delivery to customer email accounts. We also reinforce our network with additional capacity in areas where congestion is identified or as part of standard network engineering design plans. In some cases, we may limit the number of customers that can be served on a particular network node or, in very rare cases, we may need to downgrade the service available to existing customers until additional capacity can be added.

CenturyLink offers a Voice over Internet Protocol (VoIP) service called Digital Home Phone to customers with CenturyLink High-Speed Internet service which, due to the product's sensitivity to latency, receives quality of service (QoS) treatment on the CenturyLink network where it is available. This treatment of VoIP traffic should have no material impact on capacity or bandwidth availability for broadband internet access.


Other one-time fees (early termination fees) will be imposed if you cancel your service before the end date of your contract with CenturyLink. The early termination fee will be calculated by multiplying the number of months remaining on your contract and your promotional monthly rate, up to a maximum of $200.

Designed to store information in entries. These entries might represent any resource customers wish to manage: employees, e-commerce partners, conference rooms, or shared network resources such as printers. Associated with each entry is a number of attributes, each of which may have one or more values assigned. For example, typical attributes for a person entry might include first and last names, e-mail addresses, the address of a preferred mail server, passwords or other login credentials, or a digitized portrait.

According to some estimates, each of the world's largest companies has an average of 180 different directories, each designated for a special purpose. Add to this the various enterprise applications, each with its own additional directory of user names, and the actual number of special purpose directories becomes even greater.

Our passwords are the keys to our digital kingdom. Take the guesswork out of creating and remembering complex passwords with our password manager, which can store, auto-fill and even generate unique complex passwords. For added convenience, you can access your shared passwords on your PC and mobile devices with a single account. 


The ColdFusion servers that are licensed with the Virtual Core metric, ensure that you have an active internet connection at all times. If the ColdFusion server is offline, a grace period of 15 days will be provided, after which ColdFusion server reverts to the developer or trial mode.

FED LOG provides users the ability to access Federal Logistics Information System (FLIS) data during instances when internet connectivity is non-available. FED LOG provides essential information about items of supply to include the National Stock Number (NSN), the Approved and Non Approved Item Name, Manufacturers and Distributors information (to include Part Numbers), Freight Data, Hazardous Materiel Indicators, Interchangeable and Substitutable data, Acquisition Advice Code (AAC) and Unit Price, Physical and Performance Characteristics along with service specific management data.

Note: All webinars are CAC enabled; ensure that the Email certificate is selected. To attend a scheduled webinar, simply double click the desired date/time and subject within the Training Calendar   (CAC or User I.D./Password Required) for the webinar you would like to attend. Click the Web Link hyperlink at the bottom of the pop-up window and it will take you to the DCS page to attend the webinar. Once logged into DCS, the instructor for the designated course will provide the call-in number for the conference audio line. All webinar times are scheduled in Eastern Standard Time (EST).

IPv6 is the next-generation Internet Protocol (IP), designed to replace version 4 (IPv4) that has been in use since 1983. IP addresses are the globally unique numeric identifiers necessary to distinguish individual entities that communicate over the Internet. The global demand for IP addresses has grown exponentially with the ever-increasing number of users, devices, and virtual entities connecting to the Internet, resulting in the exhaustion of readily available IPv4 addresses in all regions of the world.

Most organizations have a large installed base of legacy equipment and applications. Many legacy systems cannot support IPv6. IPv6 is widely supported by network equipment vendors, and desktop systems and productivity applications generally support IPv6. Firewall and IDS implementations also are beginning to have good support for IPv6. Where organizations have difficulties supporting IPv6 is with management applications, embedded systems, and legacy applications. Legacy applications that implement network protocols or process network addresses were not written to support IP agnostic addressing (IPv4/IPv6). There were no requirements for IPv6 address handling. These applications' code assumes 32-bit addressing. The application code logic and storage allocations work with IPv4 addressing. It will take a long time to update legacy applications to support IPv6. Applications that cannot support IPv6 require the evaluation and selection of co-existence mechanisms. Organizations should plan that a significant number of legacy applications will not natively support IPv6 and include requirements to support accessing IPv4 only applications and services by IPv4 and IPv6 clients.

During the development phase, an organization should plan for an IPv6 evaluation pilot. The goals of an IPv6 pilot are to test IPv6 configuration and design assumptions against existing equipment, test and evaluate new IPv6 equipment and begin training staff. The pilot is the time to test the IPv6 numbering plan and other design assumptions. It is easier and less expensive to correct design deficiencies earlier in the transition lifecycle. As the requirements are evaluated against the existing equipment, inventory gaps may be discovered. It should be expected that some equipment will not make the transition; either it does not support IPv6 or does not meet performance expectations. The pilot should be used to evaluate new equipment and its ability to coexist in the "to be" and transition architectures. The pilot is a great opportunity to allow technical staff to develop their IPv6 skills. A pilot affords the opportunity to combine classroom training with a hands-on environment.

The coexistence plan documents which mechanisms support IPv6/IPv4 internetworking. The coexistence plan details how IPv6 clients will access legacy IPv4 services (i.e., deployment of which translation mechanisms) and how existing IPv4 clients will access IPv6 services. By planning the coexistence mechanism in advance, an organization is able to leverage economy of scale and select technology that can be a repeatable solution. This reduces the amount of required training and increases operator familiarity with the mechanisms.

Organizations should adopt a proactive approach to media sanitation. Equipment removed from the network should be sanitized before the replacement equipment is installed. This reduces the window of vulnerability and greatly decreases the risk of information disclosure. Installers should provide proof of sanitation, including a certificate of destruction with serial numbers and asset tags.


Several resources are available to answer questions while using eNavFit.


1. eNavFit overview brief (updated Nov 2023). This brief provides a general overview of eNavFit.


2. eNavFit Quick Reference Cards (updated 23 Nov 2022). These QRCs are meant as a supplement to the User Guide and provide easy-to-follow pictures and instructions for common tasks.


3. eNavFit User Guide Version 3.0.1 (updated 20 Dec 2022). This is the comprehensive user guide for eNavFit that contains detailed, step-by-step instructions for every process within the system.


4. eNavFit FAQs (updated 8 Aug 2022). This document provides a list of commonly asked questions and answers.


5. eNavFit Tips, Tricks, and Best Practices (updated 18 Oct 2023). eNavFit, while providing a number of benefits to the legacy NAVFIT98A interface, is complex and sometimes tricky to use. This guide offers suggestions and workarounds to various issues users may experience. 


6. Disconnected/Intermittent operations brief (updated 26 Oct 2022). If you anticipate using eNavFit in an area with intermittent or no Internet access, use this brief to understand the basics of eNavFit's intermittent and disconnected operations. 


7. The Navy Performance Evaluation System BUPERSINST 1610.10F (updated 1 Dec 2021). This instruction outlines all current Navy policy for performance evaluation. eNavFit is designed with policy-driven error validation on the user end. Be sure to reference policy when creating summary groups, assessing performance, assigning promotion recommendations, and all other aspects of Navy performance evaluation. 


8. BOL account request guidelines (updated 19 Jan 2023). All users of eNavFit must have a BOL account, and all reporting seniors, regardless of branch, must sign eNavFit reports. All military members of the Department of the Navy (DoN) should already have an account, but some civilians and non-DoN personnel such as supervisors in a Joint Command involved in the evaluation process may not have an account. Those personnel may request BOL access by submitting a SAAR-N form (OPNAV 5239/14) to the BOL Help Desk. 


9. eNavFit informational handouts (updated 21 Sept 2023). eNavFit Use Handout, eNavFit FAQs Handout, and eNavFit Best Practices Handout.


10. eNavFit training tutorial videos. DO NOT use Microsoft Edge or Internet Explorer on NMCI. Below are a series of videos, offered on DVIDS platforms, that walk users through the various parts of eNavFit. The best practice for learning eNavFit is to watch these videos after reviewing the resources listed above. ff782bc1db

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