IT 300 CH 9
An IPv4 address, in CIDR format, has a /27 appended at the end of the address. This tells you that ______ subnets have been created.
8
In order for an autonomous system (AS) to share IP routing information with another AS, an Interior Gateway Protocol (IGP) must be used between AS' located at an Internet Exchange Point (IXP).
FALSE
Since UDP is a connectionless protocol, source and destination ports are not needed within the UDP header.
FALSE
Border Gateway Protocols (BGP) are used to exchange routing information and cost metrics between routers in separate autonomous IP networks (i.e., non-autonomous networks).
TRUE
DNS is a network of decentralized servers that translate URLs (Uniform Resource Locators) into IP address.
TRUE
Each IPv4 packet contains a "time-to-live" which prevents a packet from remaining in the network indefinitely .
TRUE
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
Interior Gateway Protocols (IGP) enable routing tables to be shared and updated between routers within an autonomous network. Routing tables are used to determine optimal paths through an IP network.
TRUE
Internet Service Providers (ISPs) are responsible for the operations and maintenance of their own IP autonomous systems (AS).
TRUE
TCP is a connection-oriented layer 4 protocol that uses windowing as a form of network congestion control.
TRUE
The DHCP server supports manual, automatic, and dynamic IPv4 address allocation.
TRUE
Select the correct statement regarding the Internet Protocol (IP). Answers: a. IP is a connection-oriented protocol b. IP does not guarantee the delivery of correct packet sequencing c. IP guarantees packet delivery d. None of the above are correct
b. IP does not guarantee the delivery of correct packet sequencing
What is correct about the Internet Protocol? Answers: a. IP is an end-to end protocol that guarantees correct packet sequencing b. IP is an OSI Data Link Layer 2 protocol c. IP is considered a "best effort" protocol with no guarantees of packet delivery d. All of the above are correct
c. IP is considered a "best effort" protocol with no guarantees of packet delivery
Select the correct statement(s) regarding the Address Resolution Protocol (ARP). Answers: a. When an IP datagram is received, ARP initially inspects its cache to see if the IP address mapping already exists to a layer 2 MAC address b. ARP broadcasts the received IP address to all stations within the common network if not found within its cache c. ARP maps network addresses to data link layer MAC addresses d. All are correct statements
d. All are correct statements
Select the benefit(s) of implementing a NAT. Answers: 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. All of the above
d. All of the above
Select the correct statement(s) regarding ICMP. Answers: 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
d. All of the above
Select the correct statement(s) regarding IPv6. Answers: a. Increases IP addressing space to 128 bits b. Supports quality-of-service (QoS) c. Simplifies datagram header d. All of the above
d. All of the above
Select the correct statement(s) regarding TCP and UDP transport layer protocols. Answers: a. The combination of port assignment with IP address is termed a "socket" b. TCP is a connection-oriented protocol, which means that a three-way handshake is required between source and destination prior to data transmission c. UDP is a connectionless protocol, therefore correct data sequencing and flow control are not guaranteed d. All of the above are correct
d. All of the above are correct
Select the correct statement(s) regarding IP addresses. Answers: a. Each IP address contains a network ID and host address b. IPv4 class A, B, and C networks can be further divided into subnetworks through subnetting c. Class Inter-domain routing (CIDR) notation identifies subnetwork IDs d. All of the statements are correct
d. All of the statements are correct
Select the correct statement(s) regarding DHCP (dynamic host configuration protocol). Answers: a. DHCP maps intranet IP addresses to Internet IP addresses b. DHCP is the protocol used to map Ethernet MAC addresses to IPv4 addresses c. DHCP is a protocol by which a node is assigned a temporary IP address d. a and b are correct
d. a and b are correct
TCP uses the sliding window concept. Why? Answers: a. as a flow control mechanism b. as a network congestion mechanism c. as a way to guarantee proper packet sequencing and assured delivery d. all of the above
d. all of the above
Select the correct statement(s) regarding an Internet Exchange Point (IXP). Answers: a. independent ISPs exchange IP datagrams within IXP facilities which are located around the world b. peering agreements exists between ISPs to ensure the free-flow of IP packets from one AS to another c. Network Access Point (NAP) is an older name for an IXP d. all statements are correct
d. all statements are correct
Select the correct statement(s) regarding the Domain Name System (DNS). Answers: a. DNS enables the URL to remain the same even if the associated IP address changes b. DNS enables the building of hierarchical information structures c. DNS is accomplished through distributed name resolution servers d. all statements are correct
d. all statements are correct
