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Which address is used to identify the sender and receiver in an IP packet header? a. domain name b. symbolic name ¢. numeric IP d. return ANSWERVV numeric IP Which of the following is an 8-bit number that denotes various portions of an [Pv4 address? a. byte b. dotted decimal cc. octet d. bit string ANSWERV ¥ octet Which of the following terms is a synonym for a physical numeric address? a. hardware address b. MAC layer address c. PROM address d. RIPL address ANSWERV V MAC layer address Which of the following protocols translates a numeric IP address to a physical numeric address? a. ICMP b. IP c. ARP d. RARP ANSWERV V ARP Which of the following types of IPv4 addresses includes the most host addresses? a. Class A b. Class B ce. Class C d. Class D e. Class EANSWERVV Class A Which of the following address types are supported by LPv6? (Choose all that apply.) a. anycast b. broadcast c. multicast d. unicast ANSWERV ¥ a. anycast c. multicast d. unicast How large is the IPv6 address space? a. 32 bits b. 64 bits c. 128 bits d. 256 bits ANSWERV ¥ ec. 128 bits A Class A network address of 12.0.0.0 is written as 12.0.0.0/8 in prefix notation. c. improved broadcast support d. better support for mobile IP ANSWERY ¥ a. larger address space b. better security d. better support for mobile IP A default gateway is... a. any IP router b. an IP router attached to the Internet c. an IP configuration element that names the router/gateway for a particular subnet d. an IP configuration element that names the boundary router to the Internet ANSWER/V 4 c. an IP configuration clement that names the router/gateway for a particular subnet IPv6 requires cach device on the network to have its own unique address or identifier, with one exception: a. Mobile devices may use multiple identifiers because they frequently move from one network zone to the next. b. A host with multiple interfaces providing dynamic load balancing can use a single identifier for all interfaces. c. Network devices in a multicast group all use a single, unique identifier for their interfaces. d. Multiple devices on a local network may share the same anycast identifier. ANSWERV ¥ b. A host with multiple interfaces providing dynamic load balancing can use a single identifier for all interfaces. Native IPv6 addresses in a URL use which of the following characters to enclose the literal IPv6 address, according to RFC 2732 and later by 3986? a. two colons b. two braces c. two brackets d. two forward slashes ANSWERV v c. two brackets Which RFC originally proposed CIDR? a. 1519 b. 1878 c. 1918 d. 2700 ANSWERV V¥ a. 1519 The loopback address for a network interface using IPv4 is 127.0.0.1 and lets the computer user test the interface. What is the loopback address using IPv6? d.:1: ANSWERV\V b. ::1 The first byte or 8 bits of an IPv6 multicast address must be set to which of the following values? a. 0000 b. LLL ec. 1010 d. ffff ANSWERV ¥ b. 111 An IPv6 unicast address is made up of which of the following’? a. a 32-bit interface ID and a 96-bit network portion Which kinds of devices require public IP addresses? (Choose all that apply.) a. any device attached directly to the Internet b. any server whose services should be available to the internet ¢. every client on an internal network d. every server on an internal network ANSWERV V a. any device attached directly to the internet b. any server whose services should be available to the internet Which of the following services perform address hiding? (Choose all that apply.) a. e-mail b. FTP c. NAT d. proxy ANSWERVV c. NAT d. proxy What does IPv4 renumbering involve? a. assigning new IP addresses to all boundary devices b. assigning new IP addresses to all routers c. assigning new IP addresses to all servers and routers d. assigning new IP addresses to all network interfaces ANSWERV V d. assigning new IP addresses to all network interfaces In IPv6, addresses are used to send an identical message to multiple hosts. ANSWER¥V ¥ multicast Previously, IPv6 specified that interface identifiers followed which format, which specifies a unique 64-bit interface identifier for each interface? a. RFC 4941 b. EUI-64 c. EULA-64 d. IEEE 802.64v6 ANSWERV V EUL-64 What protocol is used to translate MAC layer addresses into numeric IP addresses? a. ARP b. RARP c. RIP d. IP ANSWERV ¥ RARP Which of the following can be used to replace internal network addresses with one or more different addresses so the traffic that actually travels over the public Internet does not reveal the address structure of the internal network to outsiders? a. loopback b. proxy server c. subnet mask d. layer-3 switch ANSWERV V server informs the network interface card to pass packets sent to that address to the IP stack so their contents can be read, and tells the IP gateway to forward such traffic onto the physical network, where the listening network interface resides. ANSWERYV ¥ registration c. application-specific integrated circuits d. interface identifier ANSWERV ¥ interface identifier a way of reducing the number of individual routing table entries that routers must manage a. scope identifier b. route aggregation c. aggregatable global unicast address d. layer 3 switch ANSWERY V route aggregation a 4-bit field limiting the valid range for a multicast address a. scope identifier b. loopback address c. application-specific integrated circuits d. interface identifier ANSWERV ¥ scope identifier packets goes to the nearest single instance of this address a. link-local address b. anycast address c. loopback address d. layer 3 switch ANSWERV V anycast address an addressing scheme that is designed to be used only on a single segment of a local network a. Loopback address b. Application-specific integrated circuits c. link-local address d. layer 3 switch ANSWERV ¥ link-local address an IPv6 address that is all zeros except for the very last bit, which is set to | and may be represented as ::1 in compact notation a. Loopback address b. Application-specific integrated circuits c. link-local address d. layer 3 switch ANSWERV V loopback address an address that can be combined with other addresses into a single entry in the router table a. link-local address b. anycast address c¢. loopback address d. aggregatable global unicast address ANSWER V aggregatable global unicast address Which of the following technologies is used to permit computers to translate numeric IP addresses to MAC layer addresses? a. ARP b. RARP c. Reverse proxying d. Subnet masking ANSWERV JV ARP Which technology allows networks use multiple private IPv4 addresses internally and maps them to one or more public IPv4 addresses externally? a. DNS b. IP gateway c. broadcast address d. dot squad ANSWERV ¥ broadcast address In which subnetting technique can a single address to be subdivided into multiple subnets, in which subnets need not all be the same size? a. IP gateway b. constant-length subnet masking c. variable-length subnet masking d. IP renumbering ANS WERV ¥ variable-length subnet masking Which RFC reserves three ranges of IP addresses for private use - a single Class A (10.0.0.0- 10.255.255.255), 16 Class Bs (172.16.0.0-172.31.255.255), and 256 Class Cs (192.168.0.0- 192.168.255.255)? a. 1517 b. 1518 c. 1878 d. 1918 ANSWERV ¥ 1918 Which term is used to describe the data frame crossing a router? a. firewall b. hop c¢. loopback d. dot squad ANSWERV V hop What technique may be performed by boundary devices that include proxy server capabilities to replace private IP addresses with one or more public IP addresses as outbound traffic exits the server, and to replace such public addresses with their proper private equivalents as incoming traffic passes through the server? a. IP renumbering b. Supernetting c. Address masquerading d. Subnetting ANSWERV V Address masquerading The activity of stealing (borrowing) bits from the host portion to further subdivide the network portion of an address is called . ANSWERV ¥ subnetting 
