Routing & OSPF

Protocol that used in Network Layer

• IP

• ICMP

• IGMP

• TCP

Part of IPv4 Packet Header, Except

• TTL

• Sequence Number

• Version

• Option

IPv4 has 4 byte length

• True

• False

IPv4 Private

• 192.168.1.255

• 172.32.0.1

• 172.31.0.1

• 10.255.255.255

Which of the following statements are true about the TTL field in an IPv4 header?

• Value Range 0 -255

• TTL will decreased by 1 everytime a packet process through layer 3 device

• Value Range 1 - 255

• TTL will Increased by 1 everytime a packet process through layer 3 device

If the IPv4 address of a host on a LAN is 192.168.1.1/30, the host will process IP packets with specific destination IP addresses. Which of the following IP addresses may be the destination IP addresses?

• 192.168.1.1

• 192.168.1.2

• 192.168.1.3

• 255.255.255.255

Which of the following IPv4 addresses cannot be used by a host to access the Internet without NAT?

• 100.1.1.1

• 11.1.1.1

• 10.255.254

• 172.32.1.1

Which of the following cannot be the length of an IPv4 packet header

• 20

• 30

• 60

• 64

A company applies for a class C IP address for subnetting, it has eight branches. The largest branch has a subnet and should support at least 14 hosts. What would be an appropriate subnet mask?

• 255.255.255.0

• 255.255.255.224

• 255.255.255.128

• 255.255.255.192

Which of the following is an IP address with a 12-bit mask?

• 255.240.0.0

• 255.248.0.0

• 255.128.0.0

• 255.254.0.0