IT 377 Final True/False section
False(OFDM)
802.11g uses DSSS as an access technology, operates on the frequency of 2.4GHz, and has max data rate of 54Mbps. F(OFDM)
True
802.11n operates on the frequency of 2.4G and 5GHz and has max data rate of 600Mbps.
True
An ARP request is broadcast to all devices on the network.
True
Each AP defines a network access service area; Service Set ID (SSID) is the name of the AP area.
True
If IP fragmentation occurred during IP packet delivery, only receiver conducts reassembly.
True
Individual throughput falls as the number of wireless hosts using an access point increases.
True
There are two operational modes of 802.11-based WLAN, ad hoc and infrastructure.
True
100BaseVG - AnyLAN combines the best of both Ethernet and Token Ring technologies to support time critical LAN application (convergence network, e.g., VoIP), IEEE standard is 802.12.
True
The 100VG-AnyLAN provides two levels of priority for frames: normal for low-latency service through and high priority to support multimedia applications.
True
802.11a uses OFDM as an access technology, operates on the frequency of 5GHz, and has max data rate of 11Mbps.
True
802.11ac uses OFDM, operates on the frequency of 5GHz, and has max data rate of 6.9Gbps.
False
802.11b uses FHSS as an access technology, operates on the frequency of 2.4GHz, and has max data rate of 11Mbps. F (uses DSSS)
True
A network is a communication system that allows information sharing among different hosts, where Internet is a network (WAN) of networks (LANs).
True
A network switch is based on its MAC forwarding and network router is based on routing table.
True
An ARP reply is unicast to the host requesting the mapping.
True
An Address Resolution Protocol (ARP) is a dynamic mapping method that finds a physical address, when given an IP address.
True
An access point (AP) is required to connect a WLAN to a wired network.
True
An access point ensures that all computers within range of the access point can communicate with each other .
True
An end-to-end (e2e) network path consists of multiple variant point-to-point (p2p) network links, where most of p2p links are either wired or wireless Ethernet links.
True
Auto negotiation is an Ethernet procedure by which two connected devices choose common transmission parameters, such as speed, duplex mode, and flow control.
True
Bit error rate (BER) is the number of corrupted bits per second.
True
Broadcast frames are flooded to all ports other than the originating port in the same broadcast domain.
True
Classless Inter-Domain Routing (CIDR) eliminates concept of Class A, B, C, classful network addresses and Supports route aggregation.
True
Delivery of a packet to a host or router requires two levels of addresses: logical and physical.
True
Fiber Distributed Data Interface (FDDI) is a two ring (dual ring) topology with Speed (Throughput) of 100Mbps invented to improve 10BaseT at the middle of 1990s. Major advantage are: higher speed (compared with 10BaseT) and reliability (sub-second fail-over time), FDDI has auto-failover management and control
True
Full duplex switch use one pair of UTP wire is used exclusively for transmission, and another pair is for reception. No carrier-sense and collesion detection, but could has buffer overflow, which control by 802.3x (flow control protocol).
True
IP is the most commonly used protocol and therefore the connectionless protocol responsible for source-to-destination delivery.
True
IP v6 has a fixed header length of 40 bytes, 32 bytes for the address and only 8 bytes for the header details.
True
In 1989, the 1st Ethernet switch was introduced which called "Kalpana or EPS-700. " It provides multiple simultaneous data transmission paths.where in 1993, they have the full duplex Ethernet switch.
True
In Frequency Hopping Spread Spectrum (DSSS), each bit (0 or 1) from the user data is replaced by a sequence of bits, called chip code, and then sent out.
True
In WLAN topology, (BSS) stand for Basic Service Set and ESS stand for Extended Service Set (ESS).
True
LAN emulation (called LANE) where we use ATM switch with Ethernet where to attach servers and often workstations directly to the ATM network. This will upgrade path speed to 25Mbps to 600Mbps, but we need more configuration, addition sepecial NIC card, and extra management.
True
LAN may consist of one or multiple IP subnets. Moreover, LAN may have multiple collision/broadcast domains.
True
MAC forwarding table is local, within the single broadcast domain, MAC address learning stops at the router, and a switch does not learn the MAC addresses at the other side of the router (switch learns only one MAC address of the router).
False
Network layer is responsible for providing end-to-end error control.
True
Robert Metcalfe developed Ethernet in 1972. It was called originally (ALTO), but changed the name in 1973 to Ethernet. He chose the name "ether" because the network carried bits to every workstation in the same manner.
False (destination IP)
Routing decision is based on source IP address
True
Wireless Personal Area Network (PAN) 802.15.1 uses FHSS, operate on the frequency 2.4GHz, and with low data rate of less the 1Mbps.
True
Zone in DNS may contain a domain or part of a domain and a name server may be authoritative for more than one zone.
True
The contribution of FDDI is the introduction of fiber as physical layer.
True
The first LAN technology using structued cabling plant similar to telephone network (UTP) is called StarLAN or (1Base5). Instead of poor cabling plant of 10Base5 and 10Base2.
True
The function providing p2p connection belongs to data link layer -L2. For example, in a typical LAN network, most of p2p links are either wired or wireless Ethernet links.
True
The hybrid model TCI/IP-OSI consists of 5 layers; L1-physical (OSI), L2-data link (OSI), L3-Interent (TCP/IP), L4-Transport (TCP/IP), L5-Application (combined 3 layer in OSI).
True
The network allocation vector (NAV) is a timer for collision avoidance.
True
The physical layer methods used by wireless LANs include frequency-hopping spread spectrum (FHSS), direct sequence spread spectrum (DSSS), orthogonal frequency-division multiplexing (OFDM) and a high-rate direct sequence spread spectrum (HR-DSSS).
False
There are two access methods in WLAN, Point Coordination Function (PCF: use CSMA/CA) and Distributed Coordination Function (DCF: use Polling access) F (opposite of that)
True
Tier 1 network can reach every other network on the Internet without purchasing IP Transit or paying settlements. Tier 2 network pay some settlement to reach some other network on the Internet for IP Transit, where Tier 3 network: is a network that solely purchases transit from other networks to participate in the.
True:
Token Ring is perhaps a superior technology compared to Ethernet, but Token Ring has not enjoyed widespread success since the early 1990s because of swtiching late to UTP cabling.
True
Token Ring networks use the token passing routine and a ring physical topology. On a Token Ring network, one workstation, called the active monitor, acts as the controller for token passing to rest of stations.
True
Traditionally, a local area network (LAN) is defined as a computer network that interconnects devices (computers, printers,..) in a limited area such as a home, building, or a campus.
True
Transmission media: single mode (sm) and multimode (mm) fiber with span distance from 2km to 30km.
True
Two types of network connections exist: they are connection-oriented and connectionless.
True
VLAN builds subnets without physical limitation and divid the broadcast domain, where Virtual Private Network (VPN) extends the physical boundary of a LAN.
True
We can use UTP and fiber in a switched Ethernet. But, we cannot use coax because we cannot separate transmitting from receiving in a baseband coax cable.
True
When a network mask is applied to any IP address on the network, the result is the IP address' network part followed by zeros.
True
When a station WS1 sends RTS or CTS, other stations (WS2 and WS3) on the system start NAV timer, which have to wait NAV before checking if channel is free. T
