midterm 2 questions
As for TCP and UDP, which statement is CORRECT? Both are reliable protocol. Both are defined at the transport layer of TCP/IP. Both are connection-oriented protocol. Both undertake the detection and correction of transmission errors. TCP is better than UDP in handling real-time traffic.
Both are defined at the transport layer of TCP/IP.
Choose a CORRECT statement on network addressing. A permanent IP address is dynamically allocated to a host station whenever it submits a request. The MAC address does not have to be bound to a node physically. To access LAN, a host station needs a pair of MAC and IP addresses. The MAC address is stored in a computer's hard drive. The network interface card of a computer has at least one IP address printed on it.
To access LAN, a host station needs a pair of MAC and IP addresses.
____________ shows a packet's routing path and delay while traversing the Internet. Traceroute Transmissionroad Route&delay Travelroute
Traceroute
Which is a layer one intermediary device? router switch hub gateway bridge
hub
Which correctly pairs a standard layer and its PDU name? transport: frame application: segment data link: segment physical: datagram internet: packet
internet: packet
There are many web sites that offer audio or video steaming of TV programs and movies over the Internet. These services generally rely on the _____________ technology. unicasting multicasting dualcasting broadcasting anycasting
multicasting
Standard details of network cables should be defined in the _____ layer application transport internet data link physical
physical
The router uses ARP ________. when it needs to forward an IP packet to another router whose MAC address is not available to notify its presence when it becomes active to notify that it will become inactive soon whenever it has to broadcast an IP packet every time it forwards an IP packet to a host (e.g., web server)
when it needs to forward an IP packet to another router whose MAC address is not available
Symmetric and asymmetric switches differ in terms of whether a switch allows change between error detection mode and non-detection mode. whether a switch allows change switch configurations. whether a switch allows change between the switch mode and the router mode. whether a switch allows change between store-and-forward mode and cut-through mode. whether available ports have the same speed or allow different transmission speeds.
whether available ports have the same speed or allow different transmission speeds.
Which statement is true? TCP is a connection-less protocol. IP is a reliable protocol. IP is a connection-oriented protocol. TCP is a reliable protocol. UDP is a reliable protocol.
TCP is a reliable protocol.
Temporary IP addresses are dynamically allocated by the _________ to requesting hosts. DHCP server Remote access server DNS server SNMP server SMTP server
DHCP server
If a hub has five workstations attached, how many collision domains are created? 0 1 2 4 5
0
Assume that an email should cross three subnetworks for its delivery to a destination host. How many different packets are produced along the way? 0 1 2 3 4
1
Imagine a 50% non-blocking Ethernet switch with 24 ports, each port with a speed of 100 Mbps. What can be the switch's aggregate throughput? 2400 Mbps 200 Mbps 100 Mbps 1200 Mbps 24 Mbps
1200 Mbps
MAC addresses are used at the _________ layer for addressing. Data Link Internet Physical Transport Application
Data Link
How many more bits are used in an IPv6 address than in an IPv4 address? 96 128 48 64 32
96
As for switching and routing, choose a CORRECT statement. The internet layer is responsible for packet switching. A logical path between two host stations is pre-determined in switching, making it connection-oriented. The data link layer is responsible for packet routing. A logical path between two host stations is pre-determined in routing, making it connection-oriented. Switching assumes the availability of multiple delivery paths.
A logical path between two host stations is pre-determined in switching, making it connection-oriented.
The media access protocol, CSMA/CD, is activated by the host station when it is connected to a ______. Switch Hub Bridge AP Router
Hub
The switch table should contain _____ to forward frames. exit ports and IP addresses IP addresses and MAC addresses MAC addresses and exit ports exit ports and network IDs MAC addresses and network IDs
MAC addresses and exit ports
Which of these is an internet layer function? Flow control Packet creation Session management Error control Provision of message integrity
Packet creation
Which intermediary device defines the boundary of a broadcast domain? Switch Repeater Hub Router Modem
Router
Choose a correct statement regarding network addressing. The MAC address is a global address. The IP address is a local address. The IP address can be either temporary or permanent. The MAC address is a public address recognized by the Internet. The MAC address is a temporary address.
The IP address can be either temporary or permanent.
Which is a CORRECT statement on network addressing? The MAC address of a device can be permanently changed. The MAC address consists of 12 hexadecimal characters (48 bits). The IP address is also called as hardware address. A node only needs an IP address for networking. OUI (organizational unique identifier) is an element of the IP address.
The MAC address consists of 12 hexadecimal characters (48 bits).
Choose a CORRECT statement about the operating system of an intermediary device. The router's OS is generally stored in the non-volatile flash memory. The router's OS is generally stored in the volatile flash memory. The router's OS is about the same size as Windows or Linux developed for personal computers. The switch's OS does not allow modification of its port security. Hubs and repeaters need an OS to function.
The router's OS is generally stored in the non-volatile flash memory.
________ most likely depend(s) on UDP in the transport layer. Internet surfing with a web browser E-mails Three-way video conferencing over the Internet FTP
Three-way video conferencing over the Internet
If Ethernet and WiFi LANs have to be interconnected, the _____ is a right choice as a data link layer device. switch bridge gateway router hub
bridge
The wireless access point must be a ________ device. switch repeater router hub bridge
bridge
Which is correctly pairing an intermediary device with the standard layer it operates? hub: layer 2 device switch: layer 3 device bridge: layer 2 device router: layer 2 device repeater: layer 2 device
bridge: layer 2 device
The MAC address of a NIC should be set ___. by the network administrator by the manufacturer by the operating system when the computer restarts by the DHCP server
by the manufacturer
Non-managed and managed switches differ in terms of their ability to change between the switch mode and the router mode. change switch configurations. change between store-and-forward and cut-through switch mode. change between the switch mode and the bridge mode. change between the error detection mode and the non-detection mode.
change switch configurations.
Which is an inter-networking device? network printer bridge switch router wireless access point
router
Port numbers have to be included in the header of _____________ segments only segments and datagrams packets, segments, and datagrams datagrams only packets only
segments and datagrams
Which of the following is NOT a layer in the hybrid TCP/IP-OSI architecture? physical session internet data link transport
session
Switches make switching decisions based on _______. the destination's MAC address in a frame the sender's IP address in a frame the destination's socket in a frame the sender's socket in a frame the sender's MAC address in a frame
the destination's MAC address in a frame
The real-life analogy of an IP packet is: the airplane that delivers the Jayne's letter the Jayne's letter to Brian Jayne and Brian's houses Jayne and Brian's mailing addresses the envelop that contains the Jayne's letter
the envelop that contains the Jayne's letter
