Computer Skills Questions
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The "Time-To-Live" field in IP datagram a. Decrease one on passing through each router b. If it is zero, datagram will be discarded c. Both are correct d. None is correct
NAT router must a. replace (source IP address, port #) of every outgoing datagram to (NAT IP address, new port #) for outgoing datagrams b. replace (NAT IP address, new port #) in dest fields of every incoming datagram with corresponding (source IP address, port #) stored in NAT table for incoming datagrams c. Both are correct d. None of them
In a Datagram networks, a. No call setup at network layer b. No state about end-to-end connections at the routers c. Packets may take different paths for the same source-destination pair d. All are correct
IP address written as 200.23.16.0/23 means: a. The first 23 bits are used for subnets and 9 bits are used for hosts b. The first 23 bits of the corresponding mask are 1 and last 9 bits are 0 c. Both are correct d. None of them
In IP fragmentation, a 2000 byte datagram is fragmented into _______ datagrams a. 1 b. 2 c. 3 d. None is correct
Assume that the IP address has only 8 bits; first 5 bits are used for network and the remaining bits are used for host. How many subnets and hosts in each subnets can be addressed? a. 64 subnets and 32 hosts b. 64 subnets and 64 hosts c. 32 subnets and 32 hosts d. 32 subnets and 8 hosts
How "big" is an IPv6 Internet address? a. 32 bits b. 32 bytes c. 128 bits d. 20 octets
A Virtual Circuit consists of a. Path from source to destination b. VC numbers, one number for each link along path c. Forwarding tables in routers along path d. All are correct
What is the data unit used in Internet Protocol (IP)? a. Datagram b. Packet c. Frame d. Message
What are general functions of router? a. Store and forward packets b. Find path for packets and transfer them c. Determine the next node to receive the message d. All are correct
Which two ICMPv6 messages are used during the Ethernet MAC address resolution process? (Choose two.)
The ARP table in a switch maps which two types of address together?
Which destination address is used in an ARP request frame?
When an IPv4 packet is sent to a host on a remote network, what information is provided by ARP?
A PC is configured to obtain an IPv4 address automatically from network 192.168.1.0/24. The network administrator issues the arp -a command and notices an entry of 192.168.1.255 ff-ff-ff-ff-ff-ff. Which statement describes this entry?
Which router component holds the routing table, ARP cache, and running configuration file?
A cybersecurity analyst believes an attacker is spoofing the MAC address of the default gateway to perform a man-in-the-middle attack. Which command should the analyst use to view the MAC address a host is using to reach the default gateway?
function for the average of multiple rows/columns (B5 and B9)
TFTP (Trivial File Transfer Protocol)
Frame Relay Technology works on which layer of the OSI model?