AP Cybersecurity Networking Unit 4

In an IPv4 address/subnet-mask pair, the bits that align with the 1s of the subnet mask identify the ________.

• broadcast address

• host portion

• network portion

• default gateway

Which address is reserved to identify an entire IPv4 network segment?

• Any address ending in .255

• The first address in the range

• The last address in the range

• The middle address in the range

Which of the following ranges consists solely of *private* IPv4 addresses?

• 8.8.8.0 – 8.8.8.255

• 10.0.0.0 – 10.255.255.255

• 169.254.0.0 – 169.254.255.255

• 198.51.100.0 – 198.51.100.255

The Windows command-line utility used to display or modify the ARP table is _____.

• ping

• arp

• ipconfig

• netstat

In a router’s routing table, which field indicates the “cost” of reaching a destination network?

• Next hop

• Metric

• Interface

• CIDR mask

Which dynamic routing protocol exchanges routes between Internet service-provider autonomous systems?

• RIP

• OSPF

• BGP

• EIGRP

Variable Length Subnet Masking (VLSM) allows an administrator to:

• Use IPv6 inside IPv4 packets

• Apply different-sized subnet masks within the same address block

• Convert MACs to IPs automatically

• Encrypt routing updates

A subnet has 7 host bits remaining. How many *usable* host addresses can it hold?

• 126

• 128

• 254

• 256

Which Wi-Fi security standard currently offers the strongest protection?

• WEP

• WPA

• WPA2

• WPA3

On an IPv4 host, the “default gateway” address identifies:

• the DNS server

• the host’s loopback

• the nearest router that forwards traffic to other networks

• the subnet’s broadcast