CMSC 137- Application Layer

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0 [{"id":625228,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 08:01:25","updated_at":"2018-11-24 09:13:31","questionName":"To have a hierarchical name space, a ___________ was designed. In this design the names are defined in an inverted-tree structure with the root at the top. The tree can have only 128 levels: level 0 (root) to level 127.\r\n","questionTimeSeconds":"0","questionTimeMinutes":"4","questionImagePath":null,"position":6,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625230,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 08:03:31","updated_at":"2018-11-24 09:13:31","questionName":"what is?\r\nThe information contained in the domain name space must be stored. However, it is very inefficient and also unreliable to have just one computer store such a huge amount of information.\r\n","questionTimeSeconds":"0","questionTimeMinutes":"5","questionImagePath":null,"position":8,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625234,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 08:06:21","updated_at":"2018-11-24 09:13:31","questionName":"A root server usually does not store any\r\ninformation about domains but delegates its authority to other servers, keeping references to those servers.\r\ntrue or false?","questionTimeSeconds":"0","questionTimeMinutes":"4","questionImagePath":null,"position":12,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625236,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 08:07:48","updated_at":"2018-11-24 09:13:31","questionName":"In root server, the servers are distributed all around the world.\r\ntrue or false?","questionTimeSeconds":"0","questionTimeMinutes":"3","questionImagePath":null,"position":14,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625222,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 07:58:01","updated_at":"2018-11-24 09:13:31","questionName":"The client\/server programs can be divided into two categories:\r\n","questionTimeSeconds":"0","questionTimeMinutes":"3","questionImagePath":null,"position":0,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625235,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 08:07:03","updated_at":"2018-11-24 09:13:31","questionName":"There are several root servers, each covering the a part of domain name space.\r\ntrue or false?","questionTimeSeconds":"0","questionTimeMinutes":"3","questionImagePath":null,"position":13,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625232,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 08:05:15","updated_at":"2018-11-24 09:13:31","questionName":"If the domain is not divided into smaller domains, domain and zone refer to the same thing.\r\ntrue or false?\r\n","questionTimeSeconds":"0","questionTimeMinutes":"3","questionImagePath":null,"position":10,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625233,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 08:05:49","updated_at":"2018-11-24 09:13:31","questionName":"A ___________ is a server whose zone consists of the whole tree.\r\n","questionTimeSeconds":"0","questionTimeMinutes":"3","questionImagePath":null,"position":11,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625225,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 08:00:02","updated_at":"2018-11-24 09:13:31","questionName":"A name space that maps each address to a unique name can be organized in two ways:\r\n(2)","questionTimeSeconds":"0","questionTimeMinutes":"3","questionImagePath":null,"position":3,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625226,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 08:00:34","updated_at":"2018-11-24 09:13:31","questionName":"what is?\r\na name is assigned to an address\r\na name in this space is a sequence of characters without structure\r\nit cannot be used in a large system such as the Internet because it must be centrally controlled to avoid ambiguity and duplication.\r\n","questionTimeSeconds":"0","questionTimeMinutes":"3","questionImagePath":null,"position":4,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625229,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 08:02:09","updated_at":"2018-11-24 09:13:31","questionName":"2 kinds of domains","questionTimeSeconds":"0","questionTimeMinutes":"3","questionImagePath":null,"position":7,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625227,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 08:00:54","updated_at":"2018-11-24 09:13:31","questionName":"each name is made of several parts\r\n","questionTimeSeconds":"0","questionTimeMinutes":"3","questionImagePath":null,"position":5,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625223,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 07:58:25","updated_at":"2018-11-24 09:13:31","questionName":"___________________is a supporting program that is used by other programs such as e-mail.\r\n","questionTimeSeconds":"0","questionTimeMinutes":"4","questionImagePath":null,"position":1,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625231,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 08:04:53","updated_at":"2018-11-24 09:13:31","questionName":"what is?\r\nwhat a server is responsible for or has authority over; contiguous part of the entire tree\r\n\r\n","questionTimeSeconds":"0","questionTimeMinutes":"3","questionImagePath":null,"position":9,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":625224,"quiz_id":"30656","answer_id":null,"answerType_id":"4","created_at":"2018-11-24 07:59:21","updated_at":"2018-11-24 09:13:31","questionName":"To be unambiguous, the names assigned to machines must be carefully selected from a name space with complete control over the binding between the names and IP addresses.\r\n","questionTimeSeconds":"0","questionTimeMinutes":"4","questionImagePath":null,"position":2,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null}]
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To have a hierarchical name space, a ___________ was designed. In this design the names are defined in an inverted-tree structure with the root at the top. The tree can have only 128 levels: level 0 (root) to level 127.

DOMAIN NAME SPACE





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