01
Front
How is an IPv4 address structured?
Back
An IPv4 address is a 32-bit value written as four decimal octets separated by periods.
Free Online Flashcard Deck
1 IPv4 Addressing and CIDR Fundamentals Free Online FlashCards
Study 1 IPv4 Addressing and CIDR Fundamentals with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.
12 cards
02
Front
What are the place values of an octet’s bits?
Back
The bit place values, from left to right, are 128, 64, 32, 16, 8, 4, 2, and 1.
03
Front
What do the 1s and 0s in a subnet mask identify?
Back
A subnet mask is a 32-bit value whose 1 bits mark the network prefix and whose 0 bits mark the host portion.
04
Front
What is the rule for each bit in a bitwise AND?
Back
A bitwise AND produces 1 only when both corresponding input bits are 1.
05
Front
What does the number after the slash mean in CIDR notation?
Back
The number after the slash gives the number of leading bits in the network prefix.
06
Front
How many addresses are in a /26 block?
Back
A prefix of length p contains 232−p addresses; therefore, a /26 block has 26=64 addresses.
07
Front
What are the size and value range of an IPv4 octet?
Back
Each octet contains 8 bits and ranges from 0 to 255.
08
Front
What decimal value does binary 01001101 represent?
Back
Add the place values of the bits that are 1: 64+8+4+1=77.
09
Front
What is 192.168.10.77 in binary?
Back
11000000.10101000.00001010.01001101
10
Front
What makes a subnet mask contiguous?
Back
In a valid contiguous mask, all the 1 bits come first, followed by all the 0 bits.
11
Front
What network address results from ANDing 192.168.10.77 with 255.255.255.192?
Back
192.168.10.64
12
Front
How many network bits and host bits are in a /26 prefix?
Back
It has 26 network bits and 6 host bits.
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