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QUESTION 1 1. Select the correct statement(s) regarding Internet Exchange Points (IXPs) and/or Network Access Points (NAPs). a. IXPs and NAPs are facilities that enable interoperability between autonomous systems at OSI layers 1, 2, and 3 b. peering agreements between Internet Service Providers (ISPs) within an IXP or NAP ensures the proper counting of exchanged packets and the application of appropriate surcharges c. IXPs and NAPs are facilities that enable the direct connection of privately owned intranets to the Internet d. all statements are correct 10 points QUESTION 2 1. Regarding the sharing of IP routing, IGP enables the sharing of routing information between non-autonomous systems (AS), while BGP enables the sharing of routing information within a single autonomous system (AS). True False 10 points QUESTION 3 1. What is true about the Internet Protocol (IPv4)? a. although IP datagrams can take different paths through the network, IP guarantees proper packet sequencing b. IPv4 implements flow control by use of acknowledgements and “widowing” c. IPv4 frames/datagrams have fixed lengths, which enable real time data streaming d. IPv4 addresses identify the network ID and host ID 10 points QUESTION 4 1. The purpose of the IPv4 “time-to-live” (TTL) is to ensure individual packets remain indefinitely in the network until it reaches its destination. True False 10 points QUESTION 5 1. Select the correct statement(s) regarding IP addressing. a. IPv4 and IPv6 addressing is fully compatible with one another b. CIDR address format represents a Class C network only used within an intranet c. Subnet masks are used with both class and classless IP addresses d. all statements are correct 10 points QUESTION 6 1. Which of the following is a class C IPv4 address? a. 118.20.210.254 b. 183.16.17.30 c. 215.16.17.30 d. 255.255.0.0 10 points QUESTION 7 1. You are given the subnet mask 255.255.255.0. Which of the following is a correct IPv4 address? a. 110.2.2.1 b. 130.001.246.132 c. 200.32.54.128 d. 240.240.255.1 10 points QUESTION 8 1. Given the IPv4 address in CIDR notation 211.200.10.40/27, identify the subnet ID it belongs to. a. 211.200.10.0 b. 211.200.10.32 c. 211.200.10.48 d. 211.200.10.64 10 points QUESTION 9 1. Given the IPv4 address in CIDR notation 215.200.110.50/25, identify the subnet ID that this address belongs to. a. 215.200.110.00 b. 215.200.110.128 c. 215.200.110.64 d. 215.200.128.30 10 points QUESTION 10 1. Given the Class C IPv4 address block, 200.245.10.0/28, how many subnets are possible and how many hosts can be supported by each subnet? a. 228 = 268 subnets, 24 -2 = 14 hosts per subnetwork b. 24 = 16 subnets, 228 – 2 = 268E6 hosts per subnetwork c. 24 – 2 = 14 subnets, 24 = 16 hosts per subnetwork d. 24 = 16 subnets, 24 – 2 = 14 hosts per subnetwork 10 points QUESTION 11 1. Select the correct statement(s) regarding the Address Resolution Protocol (ARP). a. ARP is a network layer protocol that maps IP addresses to TCP ports b. ARP broadcasts the received IP address to all stations within the common network if not found within its cache c. ARP is a specific protocol that only works between IP and Ethernet 802.3 MAC addresses (i.e., does not work with other data link layer standards) d. All are correct statements 10 points QUESTION 12 1. Select the correct statement(s) regarding DHCP. a. DHCP is used specifically to extend limited IPv4 addressing, therefore there is no plan to use DHCP with IPv6 b. DHCP enables IP address assignments through manual, automatic, and dynamic processes c. the DHCP protocol maps IPv4 addresses to Uniform Resource Locators (URLs) d. all statements are correct 10 points QUESTION 13 1. Select the benefit(s) of implementing a NAT. a. enables an intranet to connect to the Internet b. reduces exposure of the intranet to external Internet threats c. enables an intranet to easily switch ISPs d. helps to extend limited IPv4 addresses e. All of the above 10 points QUESTION 14 1. Using the Domain Name System (DNS) enables organizations to change ISP service providers (i.e., change IP addresses), without having to change the Uniform Resource Locator (URL). True False 10 points QUESTION 15 1. Select the correct statement(s) regarding ICMP. a. ICMP does not make IP a reliable protocol b. ICMP is used to convey issues impacting network operations c. ICMP information is useful in making routing decisions d. All of the above 10 points QUESTION 16 1. IPv6 is backward compatible with IPv4. True False 10 points QUESTION 17 1. Select the correct statement(s) regarding the TCP “windowing” concept. a. once TCP establishes a connection between source and destination, the window size is established and does not change regardless of network conditions b. the TCP windowing concept is only used with unguided medium to ensure communications when RFI conditions are poor c. the windowing mechanism is used to control network congestion by changing window sizes as network conditions change d. both a and b are correct 10 points QUESTION 18 1. Select the correct statement(s) regarding TCP. a. TCP is a connectionless protocol b. TCP uses port assignments to deliver packets to the correct applications c. TCP does not guarantee the proper sequencing of delivered packets d. all of the above are correct statements 10 points QUESTION 19 1. Since UDP is a connectionless protocol, segment ACK is not required. True False 10 points QUESTION 20 1. In an MPLS network, a routing label is affixed to the front of the IP header in order to provide quality-of-service information. This enables the prioritization of packets through an MPLS network. True False 10 points QUESTION 21 1. Select the correct statement(s) regarding the cellular concept. a. a single radio broadcast tower system enables greater frequency reuse compared to a multiple cell phone system b. cellular densification can be achieved by increasing the number of cells in the service area c. increasing the cell reuse pattern N increases cell reuse within the service area d. decreasing the size of a cell requires greater power from the mobile device, therefore reducing a mobile device’s battery power 10 points QUESTION 22 1. Select the correct statement(s) regarding cell reuse patterns/clusters. a. as cell reuse pattern “N” approaches 1, fewer system channels will be available per cell b. increasing the cell reuse pattern “N” results in greater channel availability per cell c. with N=1, Inter-cell Interference Coordination (ICIC) must be in place between adjacent cells to prevent co-channel interference d. all statements are correct 10 points QUESTION 23 1. Select the correct statement(s) regarding cellular control and traffic channels. a. When a mobile device in turned on, it connects to the nearest available base station through an available traffic channel b. Control and traffic channels are only allocated when a mobile device begins the process of making a phone call c. When a mobile device is turned on, it connects to the nearest available base station through a control channel d. All statements are correct 10 points QUESTION 24 1. When a mobile device moves from one operating cell to another, a hard handoff between cells requires connectivity to be dropped from the old cell before it can be reestablished with the new cell. True False 10 points QUESTION 25 1. What is the purpose of the mobile switching center in the GSM architecture? a. provides the air interface to mobile equipment (ME) b. supports connections between MEs, as well as to external networks such as the PSTN and Internet c. responsible for the authentication of subscribers d. all of the above 10 points QUESTION 26 1. Which cell generation(s) implemented OFDM? a. 1G b. 1G and 2G c. 1G through 3G d. 4G 10 points QUESTION 27 1. Which cellular generation replaced circuit switched connections for packet switching. a. 1G b. 2G c. 3G d. 4G 10 points QUESTION 28 1. What was one of the goals of IMT-2000? a. adopt an all-IP switching capability b. ensure greater spectral efficiency by adopting OFDM c. improve voice quality so that it is on par with the PSTN d. ensure interface with heterogenous networks such a WLANs 10 points QUESTION 29 1. What was one of the goals of IMT-Advanced? a. support both circuit-switched and packet-switched concepts b. adopt CDMA technology c. adopt IP packet switched technology d. ensure backward compatibility with 1G analog voice streams 10 points QUESTION 30 1. IMT-2020 represents the next generation of cellular capability termed 5G. True False

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