19. When a client computer needs the ip address of a url, it first queries its internal cache. If the info is not there or its old, it queries the root name server. (A) True (B) False 20. There are 13 root name server IP addresses. Anycast routing is used to find the nearest rootname server. (A) True (B) False

Q: It is possible for two UDP segments with source port 5767 to be sent by different processes at the…

A: I have given an answer in step 2.

Q: Consider the three-hop scenario shown below, where the first and third links have capacity R, and…

A: in hop-by-hop congnetion control just because of buffer overflow the sender does not perform the…

Q: What is the maximum number of hosts that can be accommodated in a subnet with a subnet mask of…

A: The maximum number of hosts that can be accommodated in a subnet is determined by the subnet mask. A…

Q: Consider the figure used to illustrate Web caching below. Suppose that the access link capacity is C…

A: The average total response time is the sum of link delay and propagation delay. Link delay = ( S/C )…

Q: Detailed assessment involves scanning all 65,536 TCP and SCTP ports for each IP address within…

A: We have an IP addresses, and then many ports on that IP addresses.

Q: An HTTP client requests a web page with 12 (additional) objects in it. The client can only figure…

A: ANSWER :- The total amount of time to get the IP address isRTT1 + RTT2 +....... +RTTn + 2RTT0 + RTT0…

Q: Supernetting can reduce the number of entries in a routing table

A: answer to the above question is in step2.

Q: For the SSH protocol, Client generates a random session key which is encrypted and sent to server.…

A: It is temporary key which is valid for only one session and it is symmetric in nature, that is, the…

Q: For the QUIC protocol to deliver HTTP True False 00, UDP must support dependability and other TCP…

A: Introduction :  UDP: UDP (User Datagram Protocol) is a transport layer protocol that is used in…

Q: Suppose a host elects to use a name server not within its organization for address resolution. When…

A:

Q: Suppose yuu are ccessing a page by ciicking ne all objects with this URL are not cached in your…

A: As we know that a network request starts from an initial point and goes to a destination point and…

Q: If DNS looks up occur every 10 minutes and the HTTP file references 8 items each time, how long…

A: One of the two forms of HTTP connections is called Non Persistent, and it's also known as HTTP 1.0.…

Q: If DNS searching happens once every 10 minutes, and each time the HTTP file references 8 items, how…

A: Non-persistent HTTP: A non-persistent connection is terminated when the server sends the requested…

Q: ARP spoofing attacks are more effective for UDP packets rather than TCP packets since TCP…

A: The first part of the question is asking whether ARP spoofing attacks are more effective for UDP…

Q: Various protocols exist to prevent data collision when multiple senders access the medium…

A: Hello studentGreetingsIn a network environment where multiple senders need to access the medium…

Q: TCP typically begins a session with: O a. TCP is not connection-oriented protocol O b. The three-way…

A: TCP stands for transmission control protocol where it begins with connection establishment phase.…

Q: The difficulty with multicasting from a practical point of view is : a. memory allocation is…

A: The difficulty with multicasting from a practical point of view is

Q: Data collision is caused when many senders access the same medium at the same time; which…

A: When numerous devices attempt to use the same communication channel simultaneously, a "data…

Q: What is an overlay network? Is it true that routers are included? What are the edges of the overlay…

A: Introduction: An overlay network is comprised of routers and edges.

Q: What is an overlay network, and how does it work? Is it true that routers are included? What are the…

A: An overlay network is a telecommunications network created on top of and supported by the…

Q: If DNS searching happens once every 10 minutes, and each time the HTTP file references 8 items, how…

A: Non-persistent HTTP: A connection that is not permanent is terminated after the server has sent the…

Q: 2. In the figure below, Host A has a UDP Echo client while Host B has a UDP Echo server. The UDP…

A: The whole amount of time needed for a data packet to travel from a source to a destination and back…

Q: In data Encapsulation Decapsulation Routing Addresing MAC sublayer adds header and a trailer to the…

A: MAC Stands for Medium Access Control .

Q: HTTP file references 8 items, how long until non-persistent HTTP and no concurrent TCP connections…

A: To find non-presistent in http : RTT-> time for small package to travel client to server and back…

Q: In wireless LAN communication, MACA is widely used. In this protocol, in order to avoid collision, a…

A: Answer:-

Q: Host A sends a huge TCP link to Host B. The amount of unrecognized bytes A sends cannot surpass the…

A: Host A sends a huge TCP link to Host B. The amount of unrecognized bytes A sends cannot surpass the…

Q: The maximum value of a TTL for a DNS resource record (RR) is 2147483647 seconds. What is the primary…

A: The answer is

Q: For this problem, find all web servers that were visited in the trace (that is, contacted via HTTP).…

A: The answer is given below:-

Q: from

A: The HTTP 1.1 protocol standard mandates that the 'Host' property is included in all communication.…

Q: For each of following ICMP messages, list their possible senders (routers, non-destination hosts,…

A: a)  Type: destination unreachable,Code: 2/3 – protocol/port is unreachable - Destination host b)…

Q: Consider the Host Aand Host B TCP link. Assume that the TCP segments that fly from host Ato host B…

A: If Host A and Host B wish to interact, they must first create a TCP link.

Q: DNS employs UDP over TCP. No automatic recovery if a DNS packet is missed. Is this a problem, and if…

A: Answer

Q: Consider the figure used to illustrate Web caching below. Suppose that the access link capacity is C…

A: Average object size= S bits. Average request rate= A request/sec. Transfer rate between LAN and…

Q: (a) Where might a datagram be queued inside a router to wait for further processing? (b) How does…

A: The computer networks are the set of the computers that are interconnected with the transmission…

Q: True or false: When a BGP router receives an announced path from a neighbour, it must apply its own…

A: BGP (Border Gateway Protocol) is a protocol that allows two networks to communicate with one…