Chapter 2 – TCP/IP
TRUE/FALSE
1. The Transport layer of the OSI model includes the RIP protocol.
2. The IP address 172.20.1.5 is a private IP address.
3. Fragmentation of IP packets is normal and doesn’t present any networking problems.
4. The TCP protocol uses a three-way handshake to create a connection.
5. IPv4 and IPv6 headers are interoperable.
MULTIPLE CHOICE
1. In which OSI model layer will you find the OSPF protocol?
a.
Application
c.
Transport
b.
Session
d.
Network
2. Which protocol is responsible for automatic assignment of IP addresses?
a.
DNS
c.
FTP
b.
DHCP
d.
SNMP
3. How are the two parts of an IP address determined?
a.
network identifier
c.
host identifier
b.
subnet mask
d.
routing table
4. Which of the following addresses is a Class B IP address?
a.
126.14.1.7
c.
189.77.101.6
b.
224.14.9.11
d.
211.55.119.7
5. Which of the following is NOT a reason for subnetting a network?
a.
controlling network traffic
c.
planning for growth
b.
increasing network security
d.
making larger groups of computers
6. If you are subnetting a class B network, what subnet mask will yield 64 subnets?
a.
255.255.252.0
c.
255.255.224.0
b.
255.255.64.0
d.
255.255.192.0
7. Which of the following is the broadcast address for subnet 192.168.10.32 with subnet mask
255.255.255.240
a.
192.168.10.63
c.
192.168.10.23
b.
192.168.10.47
d.
192.168.10.95
8. Which of the following is considered a flooded broadcast IP address?
a.
200.15.6.255
c.
255.255.255.255
b.
10.255.255.255
d.
FFFF.FFFF.FFFF
9. Which field in the IP header is an 8-bit value that identifies the maximum amount of time the packet
can remain in the network before it is dropped?
a.
TTL
c.
ECN
b.
Fragment Offset
d.
Options
10. What is the TCP portion of a packet called?
a.
frame
c.
segment
b.
data
d.
header
11. Which of the following is a reason that UDP is faster than TCP?
a.
it doesn’t use port numbers
c.
the header is smaller
b.
it has a higher priority on the network
d.
it doesn’t guarantee delivery
12. Which of the following is the first packet sent in the TCP three-way handshake?
a.
RST
c.
ACK
b.
SYN
d.
PSH
13. What does a sliding window do in a TCP packet?
a.
ensures all packets are delivered
c.
provides flow control
b.
provides packet security
d.
ensures transmission reliability
14. What should you do when configuring DNS servers that are connected to the Internet in order to
improve security?
a.
disable zone transfers
c.
disable DNS buffers
b.
delete the DNS cache
d.
setup DNS proxy
15. How large is the IPv6 address space?
a.
32 bits
c.
64 bits
b.
128 bits
d.
168 bits
16. Which of the following is NOT an advantage of IPv6 versus IPv4?
a.
larger address space
c.
supports static configuration
b.
built-in security
d.
NAT is unnecessary
17. Which IPv6 header field is known as the priority field?
a.
Version
c.
Hop Limit
b.
Flow Label
d.
Traffic Class
18. What feature in ICMPv6 replaces ARP in IPv4?
a.
Multicast Listener Discovery
c.
Echo Request
b.
Neighbor Discovery
d.
Authentication Header
19. Which of the following is a valid IPv6 address?
a.
5BA4:2391:0:0:4C3E
c.
24::5B1A::346C
b.
1080::8:800:200C:417A
d.
5510:ABCD::34:1::2
20. Which of the following is the IPv6 loopback address?
a.
000:000::
c.
::1
b.
1000:127:0:0:1
d.
::FFFF
COMPLETION
1. DNS operates at the _________________ layer of the OSI model.
2. The ______________________ is the part of the IP address that is the same among computers in a
network segment.
3. The _____________ field in an IP header is a 3-bit value indicating whether a datagram is a fragment.
4. ________________ IPv6 addresses are used for one-to-one or one-to-many communication.
5. The ____________ command shows current sessions with associated port numbers.
MATCHING
a.
broadcast
f.
unicast
b.
datagram
g.
stateless autoconfiguration
c.
fragmentation
h.
network identifier
d.
multicast
i.
Multicast Listener Discovery
e.
scopes
j.
Network Address Translation
1. a discrete chunk of information; each datagram contains source and destination
addresses, control settings, and data
2. unicast addresses used in IPv6 to identify the application suitable for the address
3. the part of an IP address that a computer has in common with other computers in its subnet
4. a process by which internal hosts are assigned private IP addresses and communicate with the Internet
using a public address
5. a transmission used for one-to-many communication, in which a single host can
send packets to a group of recipients
6. a transmission in which one packet is sent from a server to each client that
requests a file or application
7. enables IPv6 routers to discover multicast listeners on a directly connected link and to decide which
multicast addresses are of interest to those nodes
8. a communication sent to all hosts on a specific network
9. a feature of IPv6 in which a computer can connect to a network by determining its own IP address
based on the addressing of neighboring nodes
10. the division of packets into smaller sizes to accommodate routers with frame size limitations
SHORT ANSWER
1. List the seven layers of the OSI model.
2. Briefly describe Network Address Translation and how it makes a network more secure.
3. List the three classes of IP address that can be assigned to network devices and their corresponding
first octet range of values.
4. What are the three private IP address ranges and their associated subnet masks?
5. List three reasons an administrator would want to use subnetting.
6. Discuss variable length subnet masking.
7. What is CIDR? Give an example.
8. Describe the TTL field in an IP packet header.
9. Describe the three-way handshake.
10. Discuss two drawbacks of IPv4 and how IPv6 addresses those drawbacks.