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10 Cards in this Set
- Front
- Back
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Which of the following does not represent and IPv6 address?
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255.255.0.0 is an IPv4 Class B subnet mask address. All other choices are valid IPv6 addresses.
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Which of the following is a valid Class B host address?
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128.14.255.0 is a valid Class B address. Although answer A is Class B address, it is an invalid host address of all zeroes (x.x.0.0).
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What is the minimum number of data bits required for subnet addressing to allow a total of five subnets to be created?
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Three bits allow a total of six subnets to be created, giving scope for the five that need to be created. Two bits (answer B) would allow only for two subnets.
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What is port number SSH use?
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SSH uses port 22.
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Which of the following protocols provides TCP/IP name resolution?
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DNS provides name resolution. DHCP dynamically dishes out IP addresses and other important information to clients. SNMP is for network management, and Telnet provides terminal emulation functionality.
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Which protocol provides automatic host IP address assignment?
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DHCP, Dynamic Host Configuration Protocol, provides automatic host IP address assignment.
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Which layer-4 protocol is used for connectionless communication?
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UDP is the layer-4 protocol used for connectionless communication.
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What port number is used to connect to a DNS server?
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DNS servers listen on port 53.
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A user calls and says his IP address 139.154.50.12. What kind of address does he have?
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The poor guy's computer can't reach DHCP server, which means it has and APIPA address.
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Which of the following is a valid Class A address?
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Both answers A and B start in the right address range (first octet between 1 and 126), but the second octet in answer A contains an invalid number, because 255 is the highest number in and IPv4 octet.
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