Chapter 2 - How Computers Find Each Other on Networks

128 bits

How many bits does an IPv6 address contain?

IP config/release

If you are connected to a network that uses DHCP,and you need to terminate your windows workstation DHCP lease, which command would you use?

Nslookup jsmith or Ping jsmith

If you know that your colleague's TCP/IP host name is JSMITH, and you need to find out his IP address, what command should you type at your shell prompt or command prompt?

H.323, MGCP, SIP

List three signaling protocols discussed in the chapter that are used for communicating multimedia data.

546 and 547

On what port is an IPv6 client listening for DHCP messages?

IPV4=127.0.0.1 IPV6= ::1/128

What is the IPv4 loopback address? What is the IPv6 loopback address?

169.254.0.1 through 169.254.255.254

What is the range of IP addresses that might be assigned by APIPA

PAT (Port address translation)

What protocol does a network gateway use to keep track of which internal client is talking to which external Web server

Default Gateway

What type of device does a computer turn to first when attempting to make contact with a host on another network?

CIFS

What version of smb can be used across Windows, UNIX, and other operating systems?

ping6—On Linux, ping -6—On Windows

What version of the ping command do you use in Windows with IPv6 addresses? What version do you use on a Linux system

Wireshark

When determining whether a local network has any NetBIOS traffic, do you use the nslookup utility in interactive mode or a packet analyzer such as Wireshark?

Port 80 NSlookup

When running a scan on your computer, you find that a session has been established with a host at the address 208.85.40.44:80. Which protocol is in use for this session? What command-line utility might you use to find out who the host is?

FE80::/10

When your computer first joins an IVP6 network, what is the prefix of the IP address the computer first configures itself?

OUI

Which part of a MAC address is unique to each manufacturer?

SMTP is a connection based protocol

Which statement describes SMTP?

MX

Which type of DNS record identifies a mail server?

ipconfig /release NSlookup or PING

While troubleshooting a network connection problem for a coworker, you discover that the computer has a static IP address and is giving a duplicate IP address error. What command-line utility can you use to find out what other device may already be using that IP address?

ipconfig /flushdns NSlookup

While troubleshooting a network connection problem for a coworker, you discover the computer is querying a nonexistent DNS server. What command-line utility can you use to assign the correct DNS server IP address?

EUI-64

The second 64 of an autoconfigured IPV6 address may either be random or generated from the computer MAC address, which contains 48 bits. What standard defines the conversion of the MAC address to the IPv6 64-bit device id?

255

What decimal number corresponds to the binary number 11111111?

Port 21

FTP sometimes uses a random port for data transfer, but an FTP server always, unless programmed otherwise, listens to the same port for session requests from clients. What port is the FTP server listening on?

All devices on your local network

Suppose you send data to 11111111 11111111 11111111 11111111 IP address on an IVP4 network. To which device are you transmitting?

3389 is default 49152-65538

Suppose you want to change the default port for RDP as a security precaution. What port does RDP use by default, and from what range of numbers should you select a private port number?

Root Server

What computers are the highest authorities in the DOMAN Name System hieracrchy?

The lease duration for the clients computer

You are the network manager for a computer training center that allows clients to bring their own laptops to class for learning and taking notes. Clients need access to the Internet, so you have configured your network's DHCP server to issue IP addresses automatically. What DHCP option should you modify to make sure you are not wast- ing addresses that were used by clients who have left for the day?

1

You have decided to use SNAT and PAT on your small office network. At minimum, how many IP addresses must you obtain from your ISP for all five clients in your office to be able to access servers on the Internet?

ifconfig -a

You have just set up a new wireless network in your house, and you want to determine whether your Linux laptop has connected to it and obtained a valid IP address. What command will give you the information you need?

POPv3

You issue a transmission from your workstation to the following socket on your LAN: 10.1.1.145:110. Assuming your network uses standard port designations, what Application layer protocol are you using?