CertiGuide to Network+  9  Appendix A: Answers to Success Questions and Real World Exam Questions

Chapter 0011: Network Hardware Answers 1 Chapter 0101: TCP/IP Answers

1. What are the two types of routing connections?

A. Token passing

B. Connectionless

C. Reliable

D. Connection Oriented

E. Unreliable

Explanation: Routing can be either connectionless such as UDP, or connection orientated such as TCP.

& Domain 2.5: Define the purpose, function and/or use of the following protocols of TCP/IP: IP, TCP, UDP, FTP, TFTP, SMTP, HTTP, HTTPS, POP3/IMAP4, telnet, ICMP, Arp, NTP 5.

2. What are devices connected on a TCP/IP network commonly referred to as?

A. Routers

B. Servers

C. Resources

D. Hosts

E. Terminals

Explanation: A host is any device connected to a network running the TCP/IP protocol. Computers, routers, and print servers are all referred to as hosts.

& Domain 2.3: Differentiate between following protocols in terms of routing, address schemes, interoperability, and naming conventions: TCP/IP, IPX/SPX, NetBEUI, AppleTalk

3. What is the first octet range for a class A IP address?

A. 128-191

B. 1-127

C. 192-223

D. 192-255

E. 1-126

Explanation: The range of network ID numbers for a class A IP address would be 1-126.

& Domain 2.3: Differentiate between following protocols in terms of routing, address schemes, interoperability, and naming conventions: TCP/IP, IPX/SPX, NetBEUI, AppleTalk

4. Is this IP address 132.10.0.15 valid?

A. Yes

B. No

C. Depends on the subnet mask

D. Depends on the Router

Explanation: This is a Class B address, and therefore the last 2 octets would indicate an address of 0.15 which is legal. The first two octets of a Class B identify the network; the last two octets identify the local address.

& Domain 2.3: Differentiate between following protocols in terms of routing, address schemes, interoperability, and naming conventions: TCP/IP, IPX/SPX, NetBEUI, AppleTalk

5. How many network address are needed when two LANs are connected by routers?

A. Three

B. Two

C. One

D. Depends on the subnet mask

Explanation: Since there is a router connecting the two LANs, each LAN needs an address, and the link between the routers needs an address.

& Domain 2.3: Differentiate between following protocols in terms of routing, address schemes, interoperability, and naming conventions: TCP/IP, IPX/SPX, NetBEUI, AppleTalk

6. When is a subnet required?

A. When more networks are needed

B. When more hosts are needed

C. Never

D. Always

E. When 2 or more class C address ranges are used

Explanation: All IP Addresses require a subnet even if it is 255.255.255.255.

& Domain 2.3: Differentiate between following protocols in terms of routing, address schemes, interoperability, and naming conventions: TCP/IP, IPX/SPX, NetBEUI, AppleTalk.

& Domain 2.5: Define the purpose, function and/or use of the following protocols within TCP/IP: IP, TCP, UDP, FTP, TFTP, SMTP, HTTP, HTTPS, POP3/IMAP4, Telnet, ICMP, ARP, NTP.

& Domain 2.8: Identify the IP addresses (IPv4, IPV6) and their default subnet masks.

& Domain 2.9: Identify the purpose of subnetting and default gateways.

7. TCP is:

A. Connectionless and reliable

B. Connectionless and unreliable

C. Connection orientated and reliable

D. Connection orientated and unreliable

E. Operates at the Data Link layer

Explanation: Transmission Control Protocol (TCP) provides a reliable, connection-oriented method of packet delivery.

& Domain 2.3: Differentiate between following protocols in terms of routing, address schemes, interoperability, and naming conventions: TCP/IP, IPX/SPX, NetBEUI, AppleTalk.

& Domain 2.5: Define the purpose, function and/or use of the following protocols within TCP/IP: IP, TCP, UDP, FTP, TFTP, SMTP, HTTP, HTTPS, POP3/IMAP4, Telnet, ICMP, ARP, NTP.

8. You use NetBEUI exclusively on your network. Traffic is heavy. What can you do to improve performance?

A. Install a router

B. Install Cat5 cabling

C. Install a gateway

D. Install a repeater

E. Segment the network with a bridge

Explanation: A bridge will divide your network traffic, much like a bridge in a large metropolitan area. Since not all roads can simultaneously cross the bridge, traffic must stay on its side until it gets to where it can cross over the bridge.

Another way to reduce bottlenecks might be to install a switching hub.

& Domain 2.3: Differentiate between following protocols in terms of routing, address schemes, interoperability, and naming conventions: TCP/IP, IPX/SPX, NetBEUI, AppleTalk

9. Which OSI connection type is implemented by UDP?

A. Token passing

B. Packet

C. Connectionless

D. Connection

E. ARP

Explanation: Connectionless network protocols use UDP to connect. This provides no error recovery services, but also does not have the overhead that a connection-oriented protocol like TCP has. You sacrifice perfection for efficiency.

& Domain 2.2: Identify the 7 layers of the OSI model and their functions.

& Domain 2.5: Define the purpose, function and/or use of the following protocols within TCP/IP: IP, TCP, UDP, FTP, TFTP, SMTP, HTTP, HTTPS, POP3/IMAP4, Telnet, ICMP, ARP, NTP.

10. Which of the following uses computer names as addresses?

A. DHCP

B. NetBIOS

C. LMHOSTS

D. IPX

E. All choices are accurate

Explanation: NetBIOS is an extension of a PC's BIOS (Basic Input Output System), and allows humans to identify systems with something user-friendly like a computer name, rather than cumbersome digital names. An LMHOSTS file is used to match local IP addresses to machine names.

& Domain 2.7: Identify the purpose of the following network services (e.g. DHCP/bootp, DNS, NAT/ICS, WINS and SNMP)

& Domain 3.10: Given a scenario, predict the impact of a particular security implementation on Network functionality) e.g. blocking port numbers, encryption, etc.).

11. From the choices below, which protocols are routable?

A. IPX

B. TCP/IP

C. NetBEUI

D. AppleTalk

E. HTTP

Explanation: When differentiating between routable and non-routable protocols, consider where they exist in the OSI model. The routable protocols are on the transport layer, since they can transport data across networks. Other routable protocols are UDP, XTP, SPX and ATP.

& Domain 2.5: Define the purpose, function and/or use of the following protocols within TCP/IP: IP, TCP, UDP, FTP, TFTP, SMTP, HTTP, HTTPS, POP3/IMAP4, Telnet, ICMP, ARP, NTP.

12. Select the best statement about TCP:

A. It is a connection-oriented protocol

B. It is a connectionless protocol

C. It is either connection oriented or connectionless, depending on the port assignment

D. TCP has nothing to do with connectionless or connection-oriented transport

Explanation: TCP is a connection-oriented protocol. Connection-oriented protocols need a channel, or connection, to be created between the originating and destination host. Connectionless protocols require no such channel.

& Domain 2.5: Define the purpose, function and/or use of the following protocols within TCP/IP: IP, TCP, UDP, FTP, TFTP, SMTP, HTTP, HTTPS, POP3/IMAP4, Telnet, ICMP, ARP, NTP.

& Domain 2.6: Define the function of TCP/UDP ports. Identify well-known ports.

13. The _____________ address header field is used to route datagrams.

destination

Explanation: TCP uses packets to send information, each of which contains what is called header information. The Destination address header field is used to route datagrams. Other Header information includes the source address, port number etc.

& Domain 2.5: Define the purpose, function and/or use of the following protocols within TCP/IP: IP, TCP, UDP, FTP, TFTP, SMTP, HTTP, HTTPS, POP3/IMAP4, Telnet, ICMP, ARP, NTP.

14. Which of these protocols are routable? (Choose two)

A. IP

B. IPX

C. TCP

D. NetBIOS

E. NetBEUI

Explanation: TCP is the most widespread routable protocol and was designed for the Department of Defense for networking various operating systems. IPX is used primarily on Novell networks.

& Domain 2.3: Differentiate between following protocols in terms of routing, address schemes, interoperability, and naming conventions: TCP/IP, IPX/SPX, NetBEUI, AppleTalk

15. What is the first octet range for a class C IP address?

A. 1-126

B. 128-191

C. 192-225

D. 192-223

E. 192-255

Explanation: The range of network ID numbers for a class C IP address' first octet would be 192-223.

& Domain 2.3: Differentiate between following protocols in terms of routing, address schemes, interoperability, and naming conventions: TCP/IP, IPX/SPX, NetBEUI, AppleTalk

16. The process of subnetting can be useful to create additional _________

A. Networks

B. Hosts

C. PCs

D. Servers

Explanation: Subnets create more network addresses but reduce the number of hosts per network.

& Domain 2.3: Differentiate between following protocols in terms of routing, address schemes, interoperability, and naming conventions: TCP/IP, IPX/SPX, NetBEUI, AppleTalk.

& Domain 2.5: Define the purpose, function and/or use of the following protocols within TCP/IP: IP, TCP, UDP, FTP, TFTP, SMTP, HTTP, HTTPS, POP3/IMAP4, Telnet, ICMP, ARP, NTP.

& Domain 2.8: Identify the IP addresses (IPv4, IPV6) and their default subnet masks.

& Domain 2.9: Identify the purpose of subnetting and default gateways.

Chapter 0011: Network Hardware Answers 1 Chapter 0101: TCP/IP Answers