GB0-191-ENU

 The common fields of the UDP protocol and TCP protocol header are ______ . (Multiple choices)A .  Source IP addressB .  Flow controlC .  ChecksumD .  Serial numberE .  Destination portF .  Source portView AnswerAnswer:   CEF Explanation: UDP header: consists of source port, destination port, length, checksum TCP header: source port, destination port, checksum, serial number, confirmation number, window, data...

 The following statement about the IP address is wrong ______ . (Multiple choices)A . The IP address consists of two parts: the network number and the host number.B .  The network number of a class A IP address has 8 digits, and the actual variable digits are 7 digits.C .  The first octet of a class C IP address starts with 100 .D .  Address translation ( NAT ) technology is usually used to...

 The broadcast address of the natural classification network segment corresponding to the IP address 202.135.111.77 is _____________ .View AnswerAnswer:

The IP address 10.0.10.32 and the mask 255.255.255.224 represent a ______ .A .  Host addressB .  Network addressC .  Broadcast addressD .  None of the aboveView AnswerAnswer:   B Explanation:

The to-end reliable data transfer and flow control is the OSI reference model ______ .A .  Presentation layerB .  Network layerC .  Transport layerD .  Session layerView AnswerAnswer:   C

The following description of circuit switching and packet switching is correct ______ . (Multiple choices)A .  Small circuit switching delay and strong real-time transmissionB .  High utilization of circuit-switched network resourcesC .  Large packet switching delay and poor real-time transmissionD . Low packet utilization network resource utilizationView AnswerAnswer:   AC Explanation: Circuit switching: Advantages: small...

 There is a default route in the router's routing table, the destination network segment and mask are 0.0.0.0 , and the next hop is the router's S0 / 0 interface, then the following description of this route is correct ______ . (Multiple choices)A .  When the router receives a packet destined to the destination address 120.1.1.1 , if there is no...

The number of available host addresses contained in the natural classification network segment corresponding to the IP address 165.110.20.67 is (Please fill in Arabic numerals)View AnswerAnswer: 65534

The following statement about CSMA / CD is correct ______ . (Multiple choices)A . CSMA / CD is used in bus-type Ethernet, mainly to solve the problem of how to detect conflicts and ensure the orderly transmission of data when multiple stations send data simultaneously.B .  When a station connected to the Ethernet wants to transmit a...

WLAN ( Wireless LAN ) is the product of the combination of computer network and wireless communication technology. Which of the following are WLAN technical standards ? (Multiple choice)A . 802.11aB . 802.11bC . 802.11cD . 802.11gView AnswerAnswer:   AB Explanation: Maximum transmission rate